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research-article

Effect of cavity coupling factors of opposed counter-flow micro-combustor on the methane-fueled catalytic combustion characteristics

[+] Author and Article Information
YunFei Yan

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400030, PR China
yunfeiyan@cqu.edu.cn

Ying Liu

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400030, PR China
1821523102@qq.com

Haojie Li

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400030, PR China
hjl1221@cqu.edu.cn

Weipeng Huang

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400030, PR China
675554663@qq.com

Yanrong Chen

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400030, PR China
rong_box@sina.com

Lixian Li

Chongqing Cancer Institute and Hospital and Cancer Center, Chongqing 400030, China
lilixian2010@yahoo.com

Zhongqing Yang

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China
zqyang@cqu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4041405 History: Received March 13, 2018; Revised August 31, 2018

Abstract

The hetero-/homogeneous steady combustion and the blow-off limit of methane-fueled catalytic micro-reactors have been investigated in different coupling factors of opposed counter-flow micro-combustor. This investigation mainly including the influence of inlet width L2, downstream length L1, inlet length L3 and the inlet height H on the methane-fueled catalytic combustion performance. The results show that the blow-off limit and the methane conversion rate improve with the increase of inlet width L2, as the inlet width varies from 1.0 mm to 0.1mm, the blow-off limit and methane conversion rate increased by 34% and 8.7%. The other geometric parameters of inlet width L1, inlet length L3 and inlet height H can influence on the blow-off limit and methane conversion rate effectively. With the increase of the L1 and L3, the blow-off limit and methane conversion rate increase. For example, from L1=4.0mm to L1=6.0mm, the blow-off limit increase from 3.5m/s to 4.1m/s and the methane conversion rate from 89.90% to 91.04%. However, with the increases of the H, the blow-off limit and methane conversion rate decreased by 2.89% and 9.30 % respectively. Besides, the increase of the length L1 is conducive to improve the blow-off limit and methane conversion rate though.

Copyright (c) 2018 by ASME
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