An Investigation of Fuel Mixing and Reaction in a CH 4 /Syngas/Air Premixed Impinging Flame with Varied H 2 /CO Proportion

Chih-Pin Chiu, Szu-I Yeh, Yu-Ching Tsai and Jing-Tang Yang
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Chih-Pin Chiu: Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan
Szu-I Yeh: Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan
Yu-Ching Tsai: Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan
Jing-Tang Yang: Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan

Energies, 2017, vol. 10, issue 7, 1-16

Abstract: For industrial applications, we propose a concept of clean and efficient combustion through burning syngas on an impinging burner. We performed experimental measurements of particle image velocimetry, OH radical (OH*) chemiluminescence, flame temperature, and CO emission to examine the fuel mixing and reaction of premixed impinging flames of CH 4 /syngas/air with H 2 /CO in varied proportions. The velocity distribution of the combustion flow field showed that a deceleration area in the main flow formed through the mutual impingement of two jet flows, which enhanced the mixing of fuel and air because of an increased momentum transfer. The deceleration area expanded with an increased CO proportion, which indicated that the mixing of fuel and air also increased with the increased CO proportion. Our examination of the OH* chemiluminescence demonstrated that its intensity increased with increased CO proportion, which showed that the reaction between fuel and air accordingly increased. CO provided in the syngas hence participated readily in the reaction of the CH 4 /syngas/air premixed impinging flames when the syngas contained CO in a large proportion. Although the volume flow rate of the provided CO quadrupled, the CO emission increased by only 12% to 15%. The results of this work are useful to improve the feasibility of fuel-injection systems using syngas as an alternative fuel.

Keywords: syngas; impinging flame; fuel mixing; reaction; OH radical chemiluminescence; CO emission (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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