Hiller B, Hanson R K
Appl Opt. 1988 Jan 1;27(1):33-48. doi: 10.1364/AO.27.000033.
The development of a nonintrusive spectroscopic technique is reported which permits simultaneous spatially resolved measurements of two velocity components and pressure in a plane of a compressible gaseous flow field. The technique is based on the detection of fluorescence from an absorption line excited with a narrowbandwidth laser. Doppler shift and pressure broadening of the line are exploited to extract velocity and pressure information, respectively. The fluorescence is detected at a 90 degrees angle with an image-intensified 100 x 100 element photodiode-array camera which is interfaced with a laboratory computer. Results of the implementation in a Mach 1.5 underexpanded supersonic jet are presented.
报道了一种非侵入式光谱技术的发展情况，该技术能够同时对可压缩气体流场某一平面内的两个速度分量和压力进行空间分辨测量。该技术基于对由窄带宽激光激发的吸收线产生的荧光进行检测。利用谱线的多普勒频移和压力展宽分别提取速度和压力信息。通过与实验室计算机相连的图像增强型100×100元件光电二极管阵列相机在90度角处检测荧光。给出了在马赫数为1.5的欠膨胀超声速喷流中的应用结果。
