受限空间内三级旋流流场和燃烧性能研究

王志凯; 江立军; 陈盛; 刘逸博

doi:10.7527/S1000-6893.2020.24210

航空学报 >

2021 , Vol. 42 >Issue 3: 124210 - 124210

DOI: https://doi.org/10.7527/S1000-6893.2020.24210

流体力学与飞行力学

受限空间内三级旋流流场和燃烧性能研究

王志凯 ,
江立军 ,
陈盛 ,
刘逸博

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中国航发湖南动力机械研究所, 株洲 412002

收稿日期: 2020-05-11

修回日期: 2020-06-15

网络出版日期: 2020-07-06

基金资助

国家自然科学基金（51906234）

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Study on flow fields and combustion characteristics of triple swirler in confined zone

WANG Zhikai ,
JIANG Lijun ,
CHEN Sheng ,
LIU Yibo

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AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China

Received date: 2020-05-11

Revised date: 2020-06-15

Online published: 2020-07-06

Supported by

National Natural Science Foundation of China (51906234)

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摘要

为研究受限空间内三级旋流器流场特征和对应的燃烧性能，对不同方案三级旋流器开展了试验和仿真研究，分析了2种典型流场（贴壁流场和锥形流场）特性及其对火焰形态、燃烧室性能指标的影响。结果表明，通过控制三级孔特征可实现三级旋流器下游贴壁流场和锥形流场之间的转变。三级孔为30°时，旋流器的高湍动能有利于强化燃油雾化，同时形成贴壁的大尺寸回流区有利于燃油在主燃区的空间扩散和均匀分布，能够改善燃烧室点熄火性能，但会导致主燃区火焰筒壁温较高。

关键词： 三级旋流器; 贴壁流场; 锥形流场; 火焰形态; 燃烧; 受限空间

本文引用格式

王志凯 , 江立军 , 陈盛 , 刘逸博 . 受限空间内三级旋流流场和燃烧性能研究[J]. 航空学报, 2021 , 42(3) : 124210 -124210 . DOI: 10.7527/S1000-6893.2020.24210

Abstract

To investigate the flow fields and combustion characteristics of triple swirlers in confined zones, experimental and numerical investigations are conducted into triple swirlers with different structures of tertiary holes. Meanwhile, the characteristics of two typical swirling flow fields (namely, dome-attached and conical structure swirling flow) and their effects on flame shapes and combustion performance are analyzed. The results indicate that changing the structures of tertiary holes can result in significant changes in the flow field from dome-attached to conical structure swirling flow. When the tertiary hole is 30°, the higher turbulence kinetic energy of the swirler can enhance the fuel atomization quality, and the dome-attached large-sized recirculation zone is beneficial to fuel diffusion and uniform distribution in the primary zone, both of which can improve the ignition and Lean Blow-Out (LBO) characteristics of the combustor. However, it will lead to higher liner wall temperature.

Key words： triple swirlers; dome-attached swirling flow; conical structure swirling flow; flame shape; combustion; confined zones

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