风洞流场实时全息研究中的误差分析

The analysis of errors with the real time holometry performed in tunnel test

基于作者的实验及相关理论，着重分析了实时全息用于风洞流场显示研究可能出现的误差及检定、消除方法。实践表明，配以适当的光源和显示、记录系统，实时全息使全息干涉显示直接再现，现场可视、可调控，免除了实验的盲目性和大量的后续处理，便于灵活选用干涉项，在高速流场尤其是其它光学诊断方法举步维艰的强发光高温等离子体的瞬态及迅变过程的实时连续监测显示诊断研究中亦有一定的优势。现场实验过程中系统只要没有大的过阻尼型的范性移动，用于风洞实验是有效而可靠的。

Based on experiments aut hor performed and theories concerned, this paper analyses emphatically the error s probably resulted from the real time holometry(RTH) for the tunnel flow visua lization and shows the way how to determine an d to correct them. It has been shown practically that RTH,fitted with suitable light source and visualizing/recording system, enables hologram to be reconstruc ted directly and to be visualized even adjustable/controllable in the testing gr ound and , excuses experiments from blindness and lots of follow up processes. In additi on, R TH selects flexibly the interference terms and so is of particular advantage to other optical methods which are very hard to be used either in real time inspec ting/visualizing or in diagnosis researching of the twinkling and progressing st ates of high temperature dense plasma with strong radiation. After all, provide d the test device elements have not considerably shifted over dampingly and pla stically,RTH is an effective and reliable technique for tunnel test.