Flame Structure of a Jet Flame with Penetration of Side Micro-jets

曹玉春; 吴金星; 米建春; 周钰

doi:10.1016/S1004-9541(09)60006-9

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Flame Structure of a Jet Flame with Penetration of Side Micro-jets

Updated：2026-01-06

- Flame Structure of a Jet Flame with Penetration of Side Micro-jets
- Chinese Journal of Chemical Engineering Vol. 16, Issue 6, Pages: 861-866(2008)
- Affiliations：
  
  1. School of Chemical Engineering, Zhengzhou University,Henan,China,450001
  2. College of Engineering, Peking University,Beijing,China,100871
  3. Department of Mechanical Engineering, Hong Kong Polytechnic University,Hong Kong,China
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(09)60006-9
  CLC：
- Published：2008
- Accepted：
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CAO Yuchun, WU Jinxing, MI Jianchun, ZHOU Yu. Flame Structure of a Jet Flame with Penetration of Side Micro-jets[J]. , 2008, 16(6): 861-866.
DOI：

CAO Yuchun, WU Jinxing, MI Jianchun, ZHOU Yu. Flame Structure of a Jet Flame with Penetration of Side Micro-jets[J]. , 2008, 16(6): 861-866. DOI： 10.1016/S1004-9541(09)60006-9.

摘要

Abstract

In this paper

an innovative jet lifted flame with side micro-jets has been proposed and its effects on the flame structure have also been investigated.Due to the changes of the initial combustion conditions

mixing and aerodynamics which resulted from the perturbation of the side micro-jets

such a lifted jet flame has different flame structure compared with the common premixed flame.Results demonstrate that use of the micro-jets can control

to a certain extent

the flame structure

including the flame length

lift-off distance and blow-off limit.With the same fuel and air flow rate

the flame length with the side micro-jets will decrease about 5%-40% as the air volume ratio αincreases from 58%-76%.Compared with the common diffusion flame

the jet flame with the side micro-jets demonstrates to be easier to be a momentum-dominated flame.The flame length with 2 micro-jets is about 5% less than with 6 micro-jets under the same fuel and air flow rate.With the sameα

the fewer number of the controlled jets lead to the flame with relatively shorter length

not easier to be blown off and higher NO

emission.With certain fuel flow rate

the critical air volume ratio is largest for the flame with 3 micro-jets

which is more difficult to be blown off than the cases with 2

4 or 6 micro-jets.

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