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A Study on the Lift Flame Structure with Composition Ratios in Premixed Impinging Jet Flames of Syngas (H2/CO)

합성가스(H2/CO) 예혼합 충돌 제트화염에서 조성비에 따른 부상 화염구조에 관한 연구

KIM, SEULGI;SIM, KEUNSEON;LEE, KEEMAN
김슬기;심근선;이기만

  • Received : 2016.03.31
  • Accepted : 2016.04.30
  • Published : 2016.04.30

Abstract

A numerical study on lifted flame structure in impinging jet geometry with syngas composition ratio was investigated. The numerical calculations including chemical kinetic analysis were conducted using SPIN application of the CHEMKIN Package with Davis-Mechanism. The flame temperature and velocity profiles were calculated at the steady state for one-dimensional stagnation flow geometry. Syngas mixture compositions were adjusted such as $H_2:CO=10:90(10P)$, 20 : 80 (20P), 30 : 70 (30P), 40 : 60 (40P), 50 : 50 (50P). As composition ratios are changed from 10P to 50P, the axial velocity and flame temperature increase because the contents of hydrogen that have faster burning velocity increase. This phenomenon is due to increase in good reactive radicals such as H, OH radical. As a result of active reactivity, the burning velocity is more faster and this is confirmed by numerical methods. Consequently, combustion reaction zone was moved to burner nozzle.

Keywords

Hydrogen;Syngas;Impinging jet flame;Composition ratio;Lift flame;Flame structure

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Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)