彩色纹影仪设计新方法
首发时间:2012-12-19
摘要:使用普通的白色光源,利用平凸透镜的色差和分光原理,通过刀口分光,对实验中常用的普通纹影仪进行了结构改进设计,使之成为彩色纹影仪系统,并采用增大透镜焦距的措施,提高了纹影仪的测量精度。经应用于检测Ma1.2的超声速流场的激波/膨胀波系的气动实验,和Ma2.5的超声速燃烧实验中冷态流场的激波系测量,均获得了较好的彩色纹影图像。
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A new design method for the colored schlieren techniques
Abstract:Using the white light source, with the colour difference and the spectral principle of the planoconvex lens, the conventional schlieren system is transformed to a colored schlieren system, and is improved its sensitivity with the increasement of the focal length. The chromatic images of the system of shock wave and expansion waves in the Ma1.2 supersonic flow and the shock waves in the Ma 2.5 cold flowfield of the supersonic combustor, have been obtained clearly in the supersonic flow experiments.
Keywords: supersonic flow colored schlieren system shock wave expansion waves
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