In this work, numerical investigations of methane catalytic combustion in the opposed counter-flow microcombustor are conducted under various inlet velocities, equivalence ratios, and geometric parameters. The results indicate that the high temperature zone is mainly located at the front and middle parts of the reaction zone. With the increase of inlet velocity, both methane conversion and exhaust gas temperature decrease, while the methane concentration in the downstream area increases. Its maximum velocity limit is 2.9 m/s. Moreover, temperature step zones of opposed counter-flow are obviously located at the front and middle parts with different equivalence ratios. The combustion efficiency decreases slowly with the increase of equivalence ratios. More importantly, critical values about the geometric parameters are determined for keeping better thermal performance. It is concluded that inlet velocity limit and methane conversion rate can be significantly increased and the temperature distribution is more uniform via reducing inlet width L2 and inlet height H, increasing the length of the downstream parts L1 and the downstream entrance length L3. In general, the opposed counter-flow microcombustor with optimized structure has better combustion stability. This design offers another way for developing the opposed counter-flow microcombustor.
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February 2019
Research-Article
Effect of Cavity Coupling Factors of Opposed Counter-Flow Microcombustor on the Methane-Fueled Catalytic Combustion Characteristics
Yunfei Yan,
Yunfei Yan
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: yunfeiyan@cqu.edu.cn
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: yunfeiyan@cqu.edu.cn
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Ying Liu,
Ying Liu
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: 1821523102@qq.com
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: 1821523102@qq.com
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Haojie Li,
Haojie Li
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: hjl1221@cqu.edu.cn
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: hjl1221@cqu.edu.cn
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Weipeng Huang,
Weipeng Huang
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: 675554663@qq.com
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: 675554663@qq.com
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Yanrong Chen,
Yanrong Chen
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: rong_box@sina.com
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: rong_box@sina.com
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Lixian Li,
Lixian Li
Chongqing Cancer Institute and Hospital and
Cancer Center,
Chongqing 400030, China
e-mail: lilixian2010@yahoo.com
Cancer Center,
Chongqing 400030, China
e-mail: lilixian2010@yahoo.com
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Zhongqing Yang
Zhongqing Yang
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400044, China
e-mail: zqyang@cqu.edu.cn
Technologies and Systems,
Chongqing University,
Chongqing 400044, China
e-mail: zqyang@cqu.edu.cn
Search for other works by this author on:
Yunfei Yan
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: yunfeiyan@cqu.edu.cn
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: yunfeiyan@cqu.edu.cn
Ying Liu
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: 1821523102@qq.com
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: 1821523102@qq.com
Haojie Li
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: hjl1221@cqu.edu.cn
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: hjl1221@cqu.edu.cn
Weipeng Huang
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: 675554663@qq.com
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: 675554663@qq.com
Yanrong Chen
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: rong_box@sina.com
Technologies and Systems,
Chongqing University,
Chongqing 400030, China
e-mail: rong_box@sina.com
Lixian Li
Chongqing Cancer Institute and Hospital and
Cancer Center,
Chongqing 400030, China
e-mail: lilixian2010@yahoo.com
Cancer Center,
Chongqing 400030, China
e-mail: lilixian2010@yahoo.com
Zhongqing Yang
Key Laboratory of Low-grade Energy Utilization
Technologies and Systems,
Chongqing University,
Chongqing 400044, China
e-mail: zqyang@cqu.edu.cn
Technologies and Systems,
Chongqing University,
Chongqing 400044, China
e-mail: zqyang@cqu.edu.cn
1Corresponding authors.
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received March 13, 2018; final manuscript received August 31, 2018; published online September 26, 2018. Assoc. Editor: Reza Sheikhi.
J. Energy Resour. Technol. Feb 2019, 141(2): 022202 (9 pages)
Published Online: September 26, 2018
Article history
Received:
March 13, 2018
Revised:
August 31, 2018
Citation
Yan, Y., Liu, Y., Li, H., Huang, W., Chen, Y., Li, L., and Yang, Z. (September 26, 2018). "Effect of Cavity Coupling Factors of Opposed Counter-Flow Microcombustor on the Methane-Fueled Catalytic Combustion Characteristics." ASME. J. Energy Resour. Technol. February 2019; 141(2): 022202. https://doi.org/10.1115/1.4041405
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