Large eddy simulation of low swirl premixed flame stabilization mechanism

LIU Yingjie; LIU Xiao; ZHOU Bo

doi:10.13224/j.cnki.jasp.2020.02.009

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Large eddy simulation of low swirl premixed flame stabilization mechanism

更新时间：2026-07-07

- Large eddy simulation of low swirl premixed flame stabilization mechanism
- Vol. 35, Issue 2, Pages: 298-304(2020)
- 作者机构：
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- DOI：10.13224/j.cnki.jasp.2020.02.009
  CLC：
- Published：2020
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刘英杰, 刘潇, 周波. 低旋流预混燃烧稳燃机理的大涡模拟[J]. 航空动力学报, 2020, 35(2): 298-304.

doi: 10.13224/j.cnki.jasp.2020.02.009
刘英杰, 刘潇, 周波. 低旋流预混燃烧稳燃机理的大涡模拟[J]. 航空动力学报, 2020, 35(2): 298-304. DOI： 10.13224/j.cnki.jasp.2020.02.009.

doi: 10.13224/j.cnki.jasp.2020.02.009 DOI：

摘要

采用大涡模拟(LES)方法对比了高低旋流的预混燃烧特性

并分析了低旋流的稳燃机理。结果表明:LES耦合部分搅拌反应燃烧模型(PaSR)可以准确的捕捉旋流预混燃烧的细小火焰结构和流场分布。不同旋流强度引发不同的流场特性

低旋流诱发较弱的回流区

而高旋流会诱发很强的回流区

这种强烈的流场特征往往会引起振动频率极低的进动涡核拟序结构(PVC)。通过涡脱落和燃烧温度分布的瞬时耦合关系

发现火焰剪切层引起的内外涡脱落频率差是低旋流火焰稳定的最主要因素

低旋流燃烧受涡旋结构的影响交替出现W和V型火焰。

Abstract

The large-eddy simulation (LES) method was used to compare the premixed combustion characteristics of high and low swirls

and the flame stability mechanism of low swirl was analyzed. Results showed that LES coupling with PaSR combustion model can accurately capture the small structures and flow field distribution of premixed flame. The low swirl flow had a weak recirculation zone (sometimes just a low velocity zone)

while a high swirl flow produced a strong recirculation zone with a low frequency vibration of the precession vortex core (PVC). By analyzing the change of vortex and flame temperature field

it was found that vortices generated from swirl and center jet flow were the main factors of stability mechanism to stabilize flame in the low velocity region

forming alternating W and V flame.

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Related Author

Yuhang LI

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Yi WANG

Lixin ZHOU

Wenjin QIN

Lihui XU

Dengbiao LU

Hao LIU

Related Institution

National Key Laboratory of Science and Technology on Liquid Rocket Engines，Xi'an Aerospace Propulsion Institute，China Aerospace Science and Technology Corporation

Academy of Aerospace Propulsion Technology，China Aerospace Science and Technology Corporation

Beijing Aerospace Institute for Metrology and Measurement Technology， China Academy of Launch Vehicle Technology， China Aerospace Science and Technology Corporation

School of Mechanical Engineering， University of Shanghai for Science and Technology

Research Institute of Aero-engine,Beijing University of Aeronautics and Astronautics

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