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中南大学学报(英文版)

Journal of Central South University

Vol. 26    No. 8    August 2019

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Effects analysis on catalytic combustion characteristic of hydrogen/air in micro turbine engine by fuzzy grey relation method
E Jia-qiang(鄂加强)1, 2, WU Jiang-hua(吴江华)1, LIU Teng(刘腾)1, 2, CHEN Jing-wei(陈敬炜)1, 2,DENG Yuan-wang(邓元望)1, 2, PENG Qing-guo(彭庆国)1, 2

1. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;
2. Institute of New Energy and Energy-Saving & Emission-Reduction Technology, Hunan University, Changsha 410082, China

Abstract:In order to enhance catalytic combustion efficiency, a premixed hydrogen /air combustion model of the micro turbine engine is established under different excess air ratio, inlet velocity and heat transfer coefficient. And effects of inlet velocity, excess air coefficient and heat transfer coefficient on the catalytic combustion efficiency of the hydrogen have been analyzed by the FLUENT with CHEMKIN reaction mechanisms and the fuzzy grey relation theory. It is showed that inlet velocity has a more intuitive influence on the catalytic combustion efficiency of the hydrogen. A higher efficiency can be obtained with a lower inlet velocity. The optimum excess air coefficient is in the range of 0.94 to 1.0, the catalytic combustion efficiency of the hydrogen will be declined if the excess air coefficient exceeded 1.0. The effect of heat transfer coefficient on the catalytic combustion efficiency of the hydrogen mainly embodies in the case of the excess air coefficient exceeded 1.0, however, the effect will be declined if the heat transfer coefficient exceeded 4.0. The fuzzy grey relation degrees of the inlet velocity, heat transfer coefficient and excess air coefficient on the catalytic combustion efficiency of the hydrogen are 0.640945, 0.633214 and 0.547892 respectively.

 

Key words: micro turbine engine; catalytic combustion; hydrogen; fuzzy grey relation theory

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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