Density field measurement and approximate reconstruction of supersonic mixing layer  

作　　者：ZHAO YuXin YI ShiHe TIAN LiFeng HE Lin CHENG ZhongYu 

机构地区：[1]College of Aerospace and Material Engineering, National University of Defense Technology, Changsha 410073, China

出　　处：《Chinese Science Bulletin》2010年第19期2004-2009,共6页

基　　金：supported by the National Natural Science Foundation of China (10672178)

摘　　要：The density field measurement of supersonic mixing layer based on the nanoparticle-based planar laser scattering method was studied.The calibration of experimental images was analyzed,and the relation between tracer particles concentration and local density of flowfield was calibrated with oblique shockwave experiment.According to the characteristic of mixing layer images,the influence of uneven light intensity distribution was calibrated.With these calibration methods,the density field of supersonic mixing layer with convective Mach number at 0.12 was measured.By analyzing the spanwise vortical structures and streamwise density field,the three dimensional(3D) density field was approximately reconstructed,which apparently reflected the 3D structure of supersonic mixing layer.The density field measurement of supersonic mixing layer based on the nanoparticle-based planar laser scattering method was studied. The calibration of experimental images was analyzed, and the relation between tracer particles concentration and local density of flowfield was calibrated with oblique shockwave experiment. According to the characteristic of mixing layer images, the influence of uneven light intensity distribution was calibrated. With these calibration methods, the density field of supersonic mixing layer with convective Mach number at 0.12 was measured. By analyzing the spanwise vortical structures and streamwise density field, the three dimensional （3D） density field was approximately reconstructed, which apparently reflected the 3D structure of supersonic mixing layer.

关 键 词：超音速混合层 密度场 测量 超声速 图像校准 实验校准 三维结构 激光散射法 

分 类 号：O354.4[理学—流体力学]