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Effect of micro combustor geometry on combustion and emission behavior of premixed hydrogen/air flames

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  • Yilmaz, Harun
  • Cam, Omer
  • Yilmaz, Ilker

Abstract

In this study, effect of micro combustor geometry on combustion and emission behavior of premixed hydrogen/air mixtures is numerically investigated. An experimentally tested micro combustor geometry is varied by establishing a cavity or a backward facing step or micro channels inside the combustor. Considering effect of combustor geometry on the amount of heat transferred through wall based on outer wall and combustor centerline temperature distributions, combustion behavior is analyzed. Emission behavior is examined by means of mixing conditions, combustion efficiency and maximum temperature value which are highly bound to geometric properties of a micro combustor. Turbulence model used in this study is Renormalization Group k-ε. For turbulence chemistry interaction, Eddy Dissipation Concept model is used. Multistep combustion reaction scheme includes 9 species and 19 steps. Numerical results obtained from this study are validated with published experimental data. Results of this study revealed that combustion in such combustors can be improved by means of quality of mixing process, residence time, combustor centerline and outer wall temperature distributions, conversion rate of input chemical energy to utilizable heat and emanated NOx levels from combustor outlet with proposed geometric variations.

Suggested Citation

  • Yilmaz, Harun & Cam, Omer & Yilmaz, Ilker, 2017. "Effect of micro combustor geometry on combustion and emission behavior of premixed hydrogen/air flames," Energy, Elsevier, vol. 135(C), pages 585-597.
    • Handle: RePEc:eee:energy:v:135:y:2017:i:c:p:585-597
    DOI: 10.1016/j.energy.2017.06.169
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    References listed on IDEAS

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    Cited by:

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    5. Zuo, Wei & Zhang, Yuntian & Li, Qingqing & Li, Jing & He, Zhu, 2021. "Numerical investigations on hydrogen-fueled micro-cylindrical combustors with cavity for micro-thermophotovoltaic applications," Energy, Elsevier, vol. 223(C).
    6. Peng, Qingguo & Jiaqiang, E & Yang, W.M. & Xu, Hongpeng & Chen, Jingwei & Zhang, Feng & Meng, Tian & Qiu, Runzhi, 2019. "Experimental and numerical investigation of a micro-thermophotovoltaic system with different backward-facing steps and wall thicknesses," Energy, Elsevier, vol. 173(C), pages 540-547.
    7. Tang, Shihao & Wei, Jia & Xie, Bo & Shi, Zhiwei & Wang, Hao & Tian, Xinghua & He, Biao & Peng, Qingguo, 2023. "Experimental and numerical investigation on H2-fueled thermophotovoltaic micro tube with multi-cavity," Energy, Elsevier, vol. 274(C).
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    9. Zhuang Kang & Zhiwei Shi & Jiahao Ye & Xinghua Tian & Zhixin Huang & Hao Wang & Depeng Wei & Qingguo Peng & Yaojie Tu, 2023. "A Review of Micro Power System and Micro Combustion: Present Situation, Techniques and Prospects," Energies, MDPI, vol. 16(7), pages 1-28, April.
    10. Aravind, B. & Khandelwal, Bhupendra & Ramakrishna, P.A. & Kumar, Sudarshan, 2020. "Towards the development of a high power density, high efficiency, micro power generator," Applied Energy, Elsevier, vol. 261(C).
    11. Xie, Bo & Peng, Qingguo & E, Jiaqiang & Tu, Yaojie & Wei, Jia & Tang, Shihao & Song, Yangyang & Fu, Guang, 2022. "Effects of CO addition and multi-factors optimization on hydrogen/air combustion characteristics and thermal performance based on grey relational analysis," Energy, Elsevier, vol. 255(C).
    12. Choi, Jeongan & Rajasegar, Rajavasanth & Mitsingas, Constandinos M. & Liu, Qili & Lee, Tonghun & Yoo, Jihyung, 2020. "Effect of flame interaction on swirl-stabilized mesoscale burner array performance," Energy, Elsevier, vol. 192(C).
    13. Said, Syed A. & Aliyu, Mansur & Nemitallah, Medhat A. & Habib, Mohamed A. & Mansir, Ibrahim B., 2018. "Experimental investigation of the stability of a turbulent diffusion flame in a gas turbine combustor," Energy, Elsevier, vol. 157(C), pages 904-913.
    14. Wan, Jianlong & Zhao, Haibo, 2018. "Thermal performance of solid walls in a mesoscale combustor with a plate flame holder and preheating channels," Energy, Elsevier, vol. 157(C), pages 448-459.
    15. Pan, Jianfeng & Zhang, Chenxin & Pan, Zhenhua & Wu, Di & Zhu, Yuejin & Lu, Qingbo & Zhang, Yi, 2020. "Investigation on the effect of bluff body ball on the combustion characteristics for methane/oxygen in micro combustor," Energy, Elsevier, vol. 190(C).
    16. Peng, Qingguo & E, Jiaqiang & Yang, W.M. & Xu, Hongpeng & Chen, Jingwei & Meng, Tian & Qiu, Runzhi, 2018. "Effects analysis on combustion and thermal performance enhancement of a nozzle-inlet micro tube fueled by the premixed hydrogen/air," Energy, Elsevier, vol. 160(C), pages 349-360.
    17. Zhang, Yueliang & Li, Jiangheng & Xie, Jin, 2022. "Effects of lateral cooling hole configuration on a swirl-stabilized combustor," Energy, Elsevier, vol. 259(C).

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