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本文介绍了利用Talbot效应制作自成像光栅和泰曼干涉仪实时制作光栅来形成消除系统误差的大口径、高灵敏度、高精度莫尔偏折仪的设计方法和原理;并利用这种偏折仪获得了火箭燃气射流冲击效应场的莫尔偏折图和高超音速激波风洞中非对称流场的多方向莫尔偏折图,为定量计算瞬态流场打下了基础。
This paper introduces the design method and principle of large-caliber, high-sensitivity and high-precision Moire deflectometer which uses the Talbot effect to make self-imaging gratings and the Thaiman interferometer to make real-time grating to eliminate systematic errors. By using this deflection instrument The Moiré deflection diagram and the multi-direction Moiré deflection diagram of the asymmetric flow field in a hypersonic shock wind tunnel were obtained, which laid the foundation for the quantitative calculation of the transient flow field.