Application of particle image velocimetry to transonic flows,

摘要

Abstract: Over the past three years several Particle Image Velocimetry measurements have been made. In each case a different aspect of the technique has been explored. The object of the experiments has been to develop a new set of optical tools. They have been designed to provide both qualitative visualizations and quantitative diagnostic flow field data in high speed flows. One objective of the research has been to image sub-micron particles to visualize the instantaneous behavior of the flow field. The work has also been directed towards test operations which require rapid data acquisition such as transient blowdown or facilities with high running costs. The development period has also provided an optical diagnostic suitable for making measurements in unsteady flow regions. Each measurement made during this development period has been directed toward addressing different aspects of the technique and its application as a flow-field diagnostic.!10