沈 忱,王 慧,杨 帅,杨 桐,汪 洋.双旋流燃烧室冷态流场2维湍流特性试验[J].航空发动机,2024,50(3):47-52
双旋流燃烧室冷态流场2维湍流特性试验
Experimental Investigation on Two-dimensional Turbulence Characteristics of Cold Flow Fieldin a Dual-stage Swirl Combustor
  
DOI:
中文关键词:  粒子图像测速  双级旋流器  燃烧室流场  速度场  雷诺应力  湍流度  航空发动机
英文关键词:particle image velocity  dual-stage swirler  flow field of combustor  velocity fields  Reynolds stress  turbulence intensity  aeroengine
基金项目:航空动力基础研究项目资助
作者单位
沈 忱,王 慧,杨 帅,杨 桐,汪 洋 中国航发沈阳发动机研究所沈阳 110015 
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中文摘要:
      为研究燃烧室流场湍流结构特性,采用粒子图像测速仪(PIV)对双级旋流器燃烧室流场进行测量,得到了不同进气速度 下的速度场分布、雷诺应力分布和湍流度分布。结果表明:随着进气速度的提高,旋流器出口射流速度提高,中心回流区轴向速度 变化较小;在2维平面上,燃烧室轴向测量截面出现5个高雷诺应力区域,分别为中心回流区外、中心回流区与高速旋转射流交汇 区(剪切层)2处以及高速旋转射流与燃烧室头部模拟壁面接触区2处;回流区与高速旋转射流交汇区较高的雷诺应力分布有利于 燃料与空气充分混合;湍流度分布与速度波动幅值和平均流速有关,中心回流区与高速旋转射流交汇区处湍流度较高。
英文摘要:
      In order to investigate the turbulent structure of the combustor flow field, a particle image velocity (PIV) system was employed to measure the flow field characteristics of a dual-stage swirler combustor. The velocity field distribution, Reynolds stress distribution, and turbulence intensity distribution at different inlet velocities were obtained. The results show that with the increase of the inlet velocity, the jet velocity at the outlet of the swirler increases, and the axial velocity in the central recirculation zone changes slightly. There are five high Reynolds stress regions on the 2D plane of the axial measurement section of the combustor, which are the one central recirculation zone, the two intersection zone between the recirculation zone and the high-speed swirling jet (shear layer), and the two contact zone between the high speed swirling jet and the simulated wall of the combustor head. The high Reynolds stress distribution in the intersection zone between the recirculation zone and the high-speed swirling jet is conducive to the full mixing of fuel and air. Turbulence intensity distribution is related to velocity fluctuation amplitude and average velocity. Turbulence intensity is higher at the intersection zone between the central recirculation zone and the high-speed swirling jet.
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