A LASER INTERFEROMETRIC MEASUREMENT OF THE TEMPERATURE DISTRIBUTION IN CONVECTIVE HEAT TRANSFER BOUNDARY LAYERS
对流传热边界层温度分布的激光干涉测量

By means of a double mirror interferometry a two-dimensional temperature distribution measurement in convective heat boundary layers is presented. As soon as the cold air flows along a hot plate model, the interferometric fringes bend inside the boundary layer. According to the displacement of the fringe and the relation between temperature and index of refraction, a two-dimensional temperature profile is obtained. This treatment is by the optical and micro-computer method without contact with the flow field.