二维灵敏彩色纹影技术

本文介绍了一种能同时探测流场中二维的气流密度梯度,又能任意调节系统灵敏度的彩色纹影技术。其工作光源是一个由红、绿、黄、蓝四种颜色构成的“口”字形彩色狭缝。刀口机构由四片均可微调的刀刃组成。用这种技术拍摄的纹影照片色彩丰富,且以不同的颜色代表着流场中不同方向的密度梯度。此技术特别适用于纹影镜为球面反射镜的纹影系统。

A 2-D SENSITIVE COLOR SCHLIEREN TECHNIQUE

This paper introduces a new color schlieren technique thatcan detect four directional density gradientes at the same time,and thesensitivity of schlieren apparatus can be adjusted at random.The work-ing light source is a square four-color slit,which consists of red,yellow,green and blue colors,respectively.The knife edge constitution is com-posed of four edges that can be micro-adjusted separately.The colorphotograph taken by this technique is very beautiful,it indicats densitygradients in different directions with different colors in the flow field.This technique suits to schlieren system which schlieren mirrors arespherical especially.