Yazarlar
- Can, Erol(25)
- Uzun, Sinem(20)
- Yilmaz, Harun(18)
- Ting, Naim Suleyman(16)
- Kalkan, Orhan(15)
- Yesilbag, Yasar Ozkan(15)
- Sahin, Yakup(13)
- Yilmaz, Ilker(13)
- Cam, Omer(12)
- Celen, Ali(11)
- Ertugrul, Mehmet(11)
- Genç, Yasin(11)
- Huseyin, Ahmad(11)
- Salih, Ahmed Jalal Salih(10)
- Ganjehsarabi, Hadi(9)
- Tuzluca Yesilbag, Fatma Nur(8)
- Bakirci, Kadir(7)
- Ozgenel, Mehmet Cihat(6)
- Çırak, Çağrı(6)
- Acir, Adem(5)
- Acır, Adem(5)
- Amsil, Hamid(5)
- Astam, Aykut(5)
- Caglar, Bulent(5)
- Chakir, El Mahjoub(5)
- Demirci, Oğuz Kürşat(5)
- Kabach, Ouadie(5)
- Yesilbag, Fatma Nur Tuzluca(5)
- Akın, Fatih(4)
- Asgin, Mansur(4)
- Balli, Esra(4)
- Demir, Fatih(4)
- Demir, Zeynep(4)
- Dogan, Ahmet(4)
- Ekici, Selcuk(4)
- Karakoc, T. Hikmet(4)
- Katipoğlu, Okan Mert(4)
- Kilic, Bayram(4)
- Kılınç, Tuba(4)
- Manga, Müge(4)
Yayınlar
- ArticleYalnız künye2020The enhanced light harvesting performance of dye-sensitized solar cells based on ZnO nanorod-TiO2 nanotube hybrid photoanodes
Bozkurt Çırak, Burcu; Eden, Çiğdem; Erdoğan, Yaşar; Demir, Zeynep; Özdokur, K. Volkan; Caglar, Bulent; Morkoç Karadeniz, Sibel; Kılınç, Tuba; Ercan Ekinci, Ali; Çırak, Çağrı
In this study, TiO2/ZnO hybrid nanocomposites (TZ) were fabricated by two step synthesis route for potential applications as photoanode in dye sensitized solar cells (DSSC). Titania nanotubes were grown on titanium sheets by electrochemical oxidation. ZnO nanorods were decorated with hydrothermal method by equimolar (0.1 M) precursors on TiO2 nanotubes. Hydrothermal temperatures values were changed to find the optimal ZnO decoration density to increase photo conversion efficiency. The characterization of the photoanodes was made using FE-SEM, XRD and XPS techniques. The results show that hydrothermal reaction temperature can dramatically enhance the light harvesting performance of TZ photoanodes. The photo conversation efficiency of DSSC by TZ photoanode was reached 1.67 % for hydrothermal temperature of 130 °C which is twofold higher than that of DSSC by TiO2 nanotubes (0.81 %). The improvement in photo conversation conversion efficiency can be assigned to synergetic effect in TZ photoanode, lower recombination rate and charge transfer resistance.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2020The levels effect of the voltage generated by an inverter with partial source on distortion
Can, Erol
It is very important that the quality of the energy obtained is at a high level while alternating energy is obtained from the direct current energy source. In order to improve the energy quality by reducing the harmonics in the generation of the alternating current, numerous studies have been done on multi-level inverter hardware structures and switching techniques. However, the effect of the slope formed by the difference between the levels in the generated multi-level alternating voltage structure on the resulting harmonic distortions has not been studied so far. So, the paper researches the effects of the inclination between the levels of the alternating voltage generated on load by the inverter. Firstly, after the multi-level inverter structure which can produce four levels of voltage is determined, the operation of this inverter is given in the tabular form. The value of voltage formation gradients (VFG) is calculated according to a generation of multi-level voltages with different amplitude sizes between the levels of the voltage on the R L load after simulation of the system is performed at the Matlab Simulink. After that, obtained load voltages at the simulation are validated in the experiment. The effects of these gradients on the quality of the voltages are determined by measuring harmonic distortions. When the distortion values obtained according to the slope of the alternating voltage structures are analysed, it is seen that the distortion values change significantly as the slope changes. Harmonic distortion caused by VFGs gives the appropriate source values that form voltage levels for the system. Therefore, if the harmonic distortion of the current produced in the load is to be reduced or eliminated, voltage levels of alternating must be generated according to the proposed VFG method.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2020An Alternative View to the Global Coal Trade: Complex Network Approach
Semanur, Soyyigit; Hüseyin, Topuz; Halil, Özekicioǧlu
The role of energy for the developmental process of nations is a known fact due to being crucial input for any phase of production of goods and services. That's the reason why countries that are rich in energy resources also have strategic power in terms of the international trade of these resources. On the other hand, it becomes important to provide energy security for countries that are resource-poor. Although green energy has become preferred one, fossil fuel energy keeps its place as one of the most used energy resources. That's why in this study it is aimed to determine major providers and users of coal as a type of fossil fuel energy resources. It is vital to investigate the structure of global coal trade structure to determine the weaknesses and strength of supply and use of coal. Network approach provides a holistic view to the system analyzed and presents more realistic (high-degree) indicators to analyze it. In this study, global trade network of coal is analyzed from 2000 to 2017 via network analysis. Changing structure and evolution of global coal trade has been revealed via some topological parameters which are specific to complex networks such as density, clustering, assortativity/disassortativity, centrality and degree distribution.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2020A comparison study on combustion and emission characteristics of actual synthetic gas mixtures
Yilmaz, Harun; Cam, Omer; Yilmaz, Ilker
In this study, combustion and emission characteristics of output synthetic gas mixtures of two different power stations, namely Schwarze Pumpe and Fife, were investigated in a swirl stabilized combustor. For this purpose, an experimental test rig which is equipped with a premixed burner that can combust synthetic gases in a wide gas composition range was built and utilized. Tested synthetic gas mixtures are 61.9%H2-26.2%CO-6.9%CH4-5.0%CO2 (Schwarze Pumpe - H2/CO: 2.36) and 34.4%H2-55.4%CO-5.1%CH4-5.1%CO2 (Fife - H2/CO: 0.62). Actually, these gas mixtures contain slight amount of N2 and Ar. Therefore, right amount of CO2 was added to each mixture to represent these inert constituents. The comparison of combustion behavior of respective synthetic gas mixtures was conducted via examining axial and radial temperature values throughout the combustor. Besides, emission behavior was interpreted by analyzing measured CO, CO2 and NO values at combustor chimney. Results of this study showed that 61.9%H2-26.2%CO-6.9%CH4-5.0%CO2 mixture performs better in respective combustor with regard to temperature distribution, and emitted CO and NO levels.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2020Evaluation of design methodology, limitations, and iterations of a hydrogen fuelled hybrid fuel cell mini UAV
Özbek, Emre; Yalin, Gorkem; Ekici, Selcuk; Karakoc, T. Hikmet
Fossil fuels are being depleted day by day. The dependency on fossil fuels must be eliminated in the following years. Also, in the matter of emissions, the cleaner energy generation and usage techniques must be evaluated. The aviation industry is a big energy consumer nowadays. More electric aircraft and All-electric aircraft concepts are being worked on globally to achieve a sustainable aviation industry. Though the electric motors can produce enough thrust force for airliners, due to energy storage technology limitations, the thrust force can't be sustained for a long duration flight. Battery technologies are being developed to overcome these limitations. Moreover, hybrid energy systems and sustainable onboard energy generation systems are trending to achieve sustainability. Fuel Cell and Hybrid Fuel Cell systems are two of the feasible onboard energy systems. The applications of these systems on UAVs (Unmanned Aerial Vehicle) produce data for later studies. The system's behavior during flight phases must be examined on platforms like mini UAVs to understand the system capabilities. In this work, the development phases of a mini UAV designed for Hybrid Fuel Cell flight are introduced. Design philosophy and methodology for designing a UAV with a hybrid propulsion system, limitations of such designs and iterations required during the flight tests are explained. Also, the detailed design estimations of power consumption and final power consumption data collected from flight tests of the aircraft were compared to provide valuable data for following power consumption limited aircraft design studies.
RDL Kalıcı Kaydıİncele - Review ArticleAçık Erişim2019Measurement of financial performance of energy companies in bist by sd and waspas methods
Bağcı, Haşim; Yıgıter, Sule Yüksel
Gradual growth of World population, the policies carried out on energy resources, the risk of depletion of fossil energy resources and damage caused by fossil energy resources to the ecological system accelerated the search of new energy sources. These searches have led energy companies to turn to renewable energy sources. There are energy companies that use renewable energy sources in our country like the other countries in the World. In this study, the financial performance of 15 energy companies that are registered to Borsa Istanbul between 2008 and 2017 were analysed, 16 financial statement items are taken into consideration as financial performance indicators. SD and WASPAS multi criteria decision making techniques were used in this study. As a result of the research, it is clearly visible that the company which has high financial performance has changed every year; however the company that has the lowest financial performance is generally Akenerji.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2019Erzincan İlinde Bir Yeraltı Suyu Kaynaklı Isı Pompası Sisteminin Deneysel Performans Analizi
Kaya, Mehmet Nuri; Kalkan, Orhan
Bu çalışmada, Erzincan İlinde bulunan 80 m2 taban alanına sahip bir mekân Yeraltı Suyu Kaynaklı Isı Pompası (YASKIP) ile ısıtılmıştır. Deneysel olarak gerçekleştirilen bu çalışmada ısı pompasının ve tüm sistemin enerji ve performans analizi yapılmıştır. Buharlaştırıcı su debisi, yoğunlaştırıcı su debisi ve Fan-coil hava debisi belirli değerlerde sabitlenmiştir. Daha sonra bu parametrelerden oluşan 9 farklı koşulda ölçümler alınmıştır. En yüksek değerlerin alındığı koşulda, ısı pompasının ve tüm sistemin performans katsayıları sırasıyla 4.27 ve 2.92 bulunmuştur. Bu koşulda yoğuşturucudan atılan ortalama ısı yükü 14.32 kW olarak hesaplanmıştır. Diğer yandan, yeraltı suyu kalitesi ve sıcaklığı önemli bir kriter olan YASKIP sisteminin Erzincan için uygulanabilir olduğu belirlenmiştir.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2019Analysis of the Effects of Three Various Current Control Methods on BLDC Motors
Özgenel, Mehmet Cihat
Brushless direct current motors are very popular motors in a wide application area thanks to their superiorfeatures. Brushless motors are the most preferred motors in applications such as domestic, robotics, officemachines, medical, military and space applications, unmanned aerial vehicles applications because they meetthe special requirements of these applications. Brushless direct current (BLDC) motors have high volume torqueratio, high efficiency, fast dynamic response; they offer linear torque/speed characteristics. Speed control ofBLDC motors achieves by implementing pulse width modulation (PWM) technique. Various PWM controlmethods are put in to use for controlling of BLDC motor speed. These PWM methods have some certainadvantages and disadvantages. In this study, three current control PWM methods which are mostly used inpractices are examined. These are full conduction mode, independent and complementary PWM methods. Forthis purpose, three BLDC motor pre-drivers have been designed and manufactured and the effects of these threedrivers on the BLDC motor have been examined. It has been found that complementary PWM mode has givento BLDC motor fast dynamic response. Full conduction mode has drawn higher dc link current from DC powersupply. Independent PWM method performance is very close to complementary PWM method.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2019Determination of Heat Transfer Coefficients at Different pH Values of a Nanofluids and Modeling with Decision Tree Algorithm
Daş, Mehmet; Demirpolat, Ahmet Beyzade
It is important to be able to use the energy in a more beneficial way by increasing the heat transfer in the in-pipe flows. Because, with the technological developments, there is an increasing energy demand in the industry sector. For this reason, researchers have been working on new generation heat transfer fluids in recent years. In our study, nanoparticle production of CuO (copper oxide) was performed. Scanner electron microscope (SEM) image analysis and X-ray diffraction method analysis (XRD) analysis were performed to show that the material produced has the properties of nano material. A nanofluid was obtained using pure water, ethanol and ethylene glycol materials with CuO nanoparticles. Heat transfer coefficients were determined at different pH values of the obtained nanofluid. In the experimental studies, the Re value was 887 and 2290, whereas the heat transfer coefficient value was 349,821 (W/m² ° C) and 374,253 (W/m²°C), respectively. The pH value was 7.84 and 9.95, while the heat transfer coefficient was 349,821 (W/m²°C) and 374,253 (W/m²°C), respectively. Predictive models were obtained by using decision tress (DT) algorithms for heat transfer coefficients calculated by experimental studies. In order to determine the validity of the obtained models, mean square error (MSE), root mean square error (RMSE) and mean absolute percentage error (MAPE) analysis were performed. As a result, it was observed that the heat transfer coefficient value of the nanofluid decreased as the pH values increased. It was calculated that the heat transfer coefficient of the nanofluid obtained at different Reynolds values was 13.3% higher than the heat transfer coefficient of pure water.It has been shown that the KA algorithm, which is a computational intelligence method, was successful in estimating the thermophysical properties of nanofluids according to the value of 0.891 MAPE.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2019The Application of Multi-Phase Power Distribution Line with Pure Energy Conversion
Can, Erol
This paper discusses the power transmission of a six-phase power line with a six-phase LPWM inverter. The 20 km long line with six-phase is formed to be fed from the 6-phase multi-level inverter. The structure of the line and the elements of the power line are given in the design phase. After that, mathematical analysis of the power line is done to present information on the line structure and the relationship between the variables of the line. In the application stage, the described line is operating in Matlab Simulink. The input voltage of the line, the voltage of the RC parallel filter on the line and the voltage of the 1MW load on the line are measured. Six phase flux of the power is measured according to b2 and b4 bus points. Harmonic distortion of created voltages is measured. The harmonic distortion of the voltage on the Z(2) impedance is 0.12%. This level of deterioration is well below the international standard of 5% and is an ideal result for loads that need a pure multi-phase magnetic field. 6-phase voltage is measured at 244V amplitude on a 6-phase load with 1 MVA power connecting the secondary side of the transformer. Then, the distortion of this voltage is close to zero. This result is highly desirable for a load on the power line. Based on the results obtained, the power is transmitted over a 20 km long line with high quality successfully.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2019POWER REGULATION BY COUPLE HALF WAVE LPWM RECTIFIER AT THREE-PHASE LOADS
Can, Erol
The paper presents an application of power control by couple half wave LPWM rectifiers processing at the energy distribution line. The switching method with the components of semiconductor for alternating energy control in the energy distribution line is used on alternating energy sources. In three-phase power line and load, power control and regulation are done with the proposed modulation correction index (MCI). Therefore, the simulation model of 3-phase energy distribution is established after the relationships between the energy sources and the circuit elements are determined by the circuit analysis method. The controls of the current and the voltage are done by trying at the different loads in the line at the simulation. According to the modulation correction index (MCI), currents of unbalanced loads are balanced by the proposed method on the power line. Then, the balance currents and powers that MCI provides are calculated. Finally, a power line of 15 km at length that is created by connecting the model of RLC is tested. Obtained results show the effectiveness of the proposed method.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2019The Load Performance of Multi-Level Alternating Voltage Provided by Upgrade Effect
Can, Erol
In this paper, the applications of the multi-level inverter with a partial inductor are investigated on different loads. The operation of the inverter is given according to different conditions of the circuit at the six-part duty times. Mathematical equations for the inverter are forming according to the load which is resistive (R), inductive (L), and Capacitive (C) in serial connection. After describing the circuit structure, Matlab SIMULINK also simulates the circuit for loads that are RLC, and a single-phase asynchronous motor. While the voltage and current measurements for the RLC load are performed; measurements of the main winding current, auxiliary winding current, electromagnetic torque, speed are made on the asynchronous motor. RLC loads are operated at high current values such as 297A in order to examine the suitability of the proposed system for systems that may require high current. When the current harmonic distortions of RLC loads are observed, the distortion values are acceptable values that are lower than % 5 that is international standards of the IEEE. In another hand, despite the voltage is insufficient for supplying the motor at the motor application, the voltage is upgraded with the boost effect of the inverter. So, the voltage is both a multilevel and sufficient. According to the obtained results, it is shown that multi-level inverter design has been successfully performed by using partial inductor source.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2019Investigation of wind energy potential of different provinces found in Turkey and establishment of predictive model using support vector machine regression with the obtained results; [Türkiye’de bulunan farklı illerin rüzgâr enerjisi potansiyelinin incelenmesi ve sonuçların destek vektör makinesi regresyon ile tahminsel modelinin oluşturulması]
Daş, Mehmet; Balpetek, Nilay; Akpınar, Ebru Kavak; Akpınar, Sinan
In this study, wind energy potential of Sinop and Adıyaman provinces in different regions of Turkey were analyzed statistically, based on the hourly measured data by Directorate of State Meteorological Station in 2008-2017 years. During the statistical analysis, average wind speed, standard deviation of wind speed, maximum wind speed and wind power density were determined. The Weibull distribution function was used to the distribution of wind speed and determination of wind power intensity. For the power density values obtained as a result of the study, a predictive model was established with the support vector machine (SVM) regression. Polynomial kernel, normalized polynomial kernel, radial basis function (RBF) kernel and Pearson universal kernel VII (PUK) models were used in SVM regression. Mean absolute error (MAE), root mean square error (RMSE), relative absolute error (RAE), and root relative square error (RRSE) error analyzes were performed for SVM regression estimates. The best estimation of wind power density predictive models generated by 4 different kernel functions using SVM regression was shown to belong to the polynomial kernel.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2019Fault determination and analysis of complex switching structure at multilevel inverter
Can, Erol
In energy conversion studies, some situations have been aimed at up to now. According to this, while the direct voltage is converted from some renewable energy sources to the alternating voltage, the shape of the voltage must be close to the sinus. Therefore, the works are being done on inverters with multi-levels. As the level of the inverters increases, the number of switches and control signals on them increases and it becomes harder to find the possible errors. Finding faults of a device with a large number of transistors with control signals is important, very difficult, and time-consuming task. This paper addresses the issue of determining fault conditions for a multi-level inverter with a very complex switching scheme. The results are analyzed and evaluated after the values obtained in the simulation are validated by the experimental study. For different switch fault conditions at the applications, the harmonic distortion of the alternating voltage is measured and made into tables. After that, different fault conditions of the 21-level inverter structure are explained when fault curves are created from the distortion value of the fault signals.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2019Performance assessment of solar-powered high pressure proton exchange membrane electrolyzer: A case study for Erzincan
Ganjehsarabi, Hadi
In this study, a performance assessment of a solar-powered high-pressure proton exchange membrane (PEM) electrolyzer for hydrogen production is conducted. The feasibility analysis of photovoltaic systems equipped with a high pressure PEM electrolyzer is presented for a university campus-scale community in Erzincan- Turkey. Variable solar irradiance data sets are utilized to assess the performance of the proposed system. A parametric study is conducted in order to evaluate the influence of some design parameters as well as operating conditions on the efficiency of the system. Efficiency of the overall system in the case of relevant inverter sizing is in the range of 11–12%. An ascent of the number of stacks leads to an increase in production rate which is almost linear by photovoltaic (PV) array size. The results shows that in order to have a higher efficiency, the inverter size should be higher than 0.75% of maximum excess power. The proposed system investigated in this study shows great promise of opening up opportunity to develop the high pressure PEM electrolyzer.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2019Design and application of a novel snubber cell for soft switched pwm dc–dc converters
Sahin, Yakup; Ting, Naim Suleyman
This paper introduces a novel active snubber cell for soft switching PWM DC–DC converters. In the proposed converter, the main switch is turned on under zero voltage transition (ZVT) and turned off under zero voltage switching (ZVS). The auxiliary switch and all of the other semiconductors in the converter are turned on and off with soft switching (SS). There is no extra voltage stress on the semiconductor devices. Besides, the proposed converter has simple structure and ease of control due to common ground. In this treatise, the theoretical and mathematical analysis of the proposed converter are presented and the design procedure of converters is also provided. The simulation study at 100 kHz switching frequency and 600 W output power are conducted. The experimental prototype of converter is operated under same conditions. Both the simulation and the experimental prototype exhibits similar performances. Ultimately, the efficiency of the proposed converter is 95.7% at nominal power.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2019Facile synthesis of hybrid ZnO nanostructures by combined electrodeposition and chemical bath deposition for improved performance of dye-sensitized solar cell
Boda, Muzaffar Ahmad; Bozkurt Çırak, Burcu; Demir, Zeynep; Çırak, Çağrı
Herein, equimolar hexamethylenetetramine (HMT) were used to couple chemical bath deposition (CBD) and electrode deposition (ED) techniques to decorate electrodeposited one-dimensional (1-D) ZnO nano-rods with wurtzite nano-spindles in the attempt of increasing surface area to fabricate efficient and cost-effective dye sensitized solar cell (DSSC) photo-anode. The resulting hybrid photo-anode offers an enhancement of 43% in photocurrent density than bare ZnO nano-rods. The corresponding augmentation in photocurrent response is attributed to comparative increase in crystallinity and considerable decrease in charge transfer resistance across the interface as being analyzed by X-ray diffraction and electrochemical impedance spectroscopy (EIS), respectively.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2019Mixed refrigerant as working fluid in Organic Rankine Cycle for hydrogen production driven by geothermal energy
Ganjehsarabi, Hadi
The possibility of utilizing low temperature heat source systems for producing electricity has been significant due to increasing energy demand. In this study, the Organic Rankine Cycle (ORC) integrated with proton exchange membrane (PEM) electrolyzer is analyzed thermodynamically and economically. A mixture of butane, pentane and iso-pentane is selected as working fluid. The results show that utilizing the mixed refrigerant enhances the performance of the system and results in a higher hydrogen production rate because of a glide match of temperature profiles in the heat exchangers. Economic analysis results which are helpful in designing entire the system show that the highest cost component is electrolyzer, followed by the turbine and condenser.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2019Modeling of heat transfer coefficient in solar greenhouse type drying systems
Çerçi, Kamil Neyfel; Daş, Mehmet
As a sustainable energy source, solar energy is used in many applications. A greenhouse type dryer, which is a food drying system, directly benefits from solar energy. Convective heat transfer coefficient (hc) is an important parameter in food drying systems, in terms of system design and performance. Many parameters and equations are used to determine hc. However, as it is difficult to manually process and analyze large amounts of data and different formulations, machine learning algorithms are preferred. In this study, natural and forced convective solar greenhouse type dryers were designed. In a solar greenhouse type dryer, grape is dried in natural (GDNC) and forced convection (GDFC). For convective heat transfer coefficient (hc), predictive models were created using a multilayer perceptron (MLP)-which has many uses in drying applications, as mentioned in the literature-and decision tree (DT), which has not been used before in food drying applications. The machine learning algorithms and results of the estimated models are compared in this study. Error analyses were performed to determine the accuracy rates of the obtained models. As a result, the hc value of the dried grape product in a natural convective solar greenhouse type dryer was 11.3% higher than that of the forced type. The DT algorithm was found to be a more successful model than the MLP algorithm in estimating hc values in HDFC according to Root Mean Square Error. (RMSE = 0.0903). On the contrary, the MLP algorithm was more successful than the DT algorithm in estimating hc values in GDNC (RMSE = 0.0815).
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2019Investigation of combustion and emission performance of a micro combustor: Effects of bluff body insertion and oxygen enriched combustion conditions
Yilmaz, Harun
Major challenges for micro combustors are high heat losses and inappropriate residence time. In this study, it was aimed to eliminate these challenges via placing bluff bodies into the combustion zone and combusting fuel with oxygen enriched air. To this end, micro combustor models with different geometries were constructed and in these models, premixed H2/air combustion was simulated by using ANSYS/Fluent CFD code to investigate effects of bluff body shape, location and thickness, and low level O2 enhancement on performance determining parameters such as rate of conversion of fuel to useable heat, temperature uniformity, pollutant emissions etc. To further analyze effects of micro combustor geometry, a perforated plate was also placed into the combustion zone. Thermal performance of the micro combustor with perforated plate insertion in O2 enriched conditions was found to be highest in terms of increased reaction kinetics and heat transfer characteristics. The trade-offs of respective design are increased NOx emissions and slightly decreased temperature uniformity.
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