试验研究旋流数对燃烧室气动性能的影响

党新宪; 赵坚行; 徐榕; 颜应文; 刘勇

试验研究旋流数对燃烧室气动性能的影响

1.
南京航空航天大学能源与动力学院,南京 210016
2.
中国人民解放军94580部队航理室,蚌埠 233000

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出版历程
- 收稿日期: 2009-12-03
- 修回日期: 2010-03-20
- 刊出日期: 2011-01-28

Experimental investigation on effects of swirl number on aerodynamic characteristics of combustor

1.
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
2.
Department of Flight Theory Education, The Chinese Peoples Liberation Army Unit 94580,Bengbu 233000,China

摘要

摘要: 为了深入了解双级轴向旋流器的旋流数变化对模型环形燃烧室内气流结构与气动性能的影响,采用粒子图像速度仪(PIV)对燃烧室内冷态和液雾燃烧流场进行测量,试验研究在冷、热态情况下不同旋流数对模型燃烧室内回流区的尺寸、平均速度( , )、脉动速度(u_rms,v_rms)以及雷诺剪切应力u'v' 分布的影响.研究结果表明:旋流数变化对燃烧室内冷、热态流场有着重要的影响;燃烧室在燃烧情况下所得的中心回流区长度要比冷态短,但回流区内速度、脉动速度u_rms增强.旋流数增大后,回流区内负速度减小,回流区宽度稍有缩小.在燃烧流场中,旋流数的变化对回流负速度的影响减弱.
- 环形燃烧室 /
- 双级轴向旋流器 /
- 旋流数 /
- 液雾燃烧流场 /
- 粒子图像速度仪(PIV)测量
Abstract: To investigate the influence of different swirl numbers on flow structure and aerodynamic characteristics of the model annular combustor with double axial swirler,the isothermal and spray combusting flow fields of the model annular combustor with double axial swirler were measured by a particle image velocimetry (PIV) system.Effects of different swirl numbers on the formation of recirculation zone,profiles of ensemble-averaged velocities ( , ),fluctuating velocities (u_rms,v_rms)and Reynolds shear stress u'v' in the combustors were investigated experimentally.Results of the PIV show that influences of different swirl numbers on isothermal and reacting flow fields are considerable.The length of central recirculation zone of reacting flows is shorter than that of non-reacting flows.However,the recirculation velocity,fluctuating velocity and Reynolds shear stress of reacting flows are higher than those of non-reacting flows.The changes of length and recirculation velocity for the central recirculation zone decrease with increase in swirl number under reacting flows.
- annular combustor /
- double axial swirler /
- swirl number /
- spray combusting flow field /
- PIV（particle image velocimetry） measurement

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参考文献(12)

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