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Energy Sources, Part A: Recovery, Utilization, and Environmental Effects Volume 40, 2018 - Issue 11
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Original Articles

Liftoff behavior and combustion characteristic of jet flame in a coflow burner

Haitao ZhangDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui, P.R. ChinaView further author information
,
Fengyu LiDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui, P.R. ChinaView further author information
,
Gaofeng WangSchool of Aeronautics and Astronautics, Zhejiang University, Hangzhou, Zhejiang, P. R. ChinaView further author information
,
Qifu HuangDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui, P.R. ChinaView further author information
&
Qizhao LinDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui, P.R. ChinaCorrespondence[email protected]
View further author information
Pages 1366-1373 | Published online: 05 Jun 2018
 
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ABSTRACT

Stabilization and autoignition mechanisms of lifted flames have been widely investigated to improve combustion efficiency and safety of combustion equipment. This paper focuses on liftoff behavior and combustion characteristic of methane and propane flames under various coflow conditions in a coflow burner. Unlike the case of free jet flame in ambient air, the different tendencies of liftoff height changes with jet velocity for both methane and propane flames in vitiated coflow illustrate a transition from conventional combustion to Moderate & Intense Low Oxygen Dilution (MILD) combustion. Flame temperature difference with radial position measured by primary spectrum pyrometry proves the transition regime.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51376171].

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