光学头罩超声速绕流流场光学传输效应风洞试验研究

在Ma=3连续超声速风洞中,开展了光学头罩绕流流场光学传输效应的风洞模拟试验方法研究,进行了现场振动测量与隔离,研制了专用试验装置,采用哈特曼传感器和剪切干涉仪两种手段进行了光学传输效应的试验测量。试验中,针对试验装置各部分的不同组合状态,进行了大量的测试,研究了试验装置有效性以及试验数据重复性,着重分析了探测光束的PV值与RMS值。结果表明：导流板可明显抑制风洞洞壁边界层干扰,试验装置与方法可行,对于连续式风洞中模型绕流流场光学传输效应测试有一定参考价值。

Experimental study on the optical propagation effect of the flowfield surrounding the optical headcover in supersonic wind tunnel

For measuring optical propagation effects of a head-cover’s flow fields,a simulated test method is introduced in a continuous supersonic wind tunnel（Ma=3）.With the analysis of vibration measurement and isolation,specialized test equipment is developed.Finally,optical propagation effects are measured both with Hartmann wavefront sensor and shearing interferometer.In the pilot study,with different combinations of the experimental apparatus,a large number of tests have been done,from which to study the effectiveness of the experimental apparatus and the repeatability of the data.And the data analysis focus on the PVand RMSof the probe beam.With the test result,we can conclude that the wind guiding deflector is able to reduce the interference of boundary layer generated by the wall of wind tunnels,and the experimental equipment and method we developed are quite qualified for optical propagation effects measurement in continuous wind tunnels.