计算流动显示研究及应用

Investigation and Application of Computational Flow Imaging

基于光学成像原理,计算流动显示技术可以将数值计算的结果转换成类似于实验照片的图像。该文采用结构网格对基于非结构网格的流场信息进行重构,得到相应的纹影图、阴影图以及干涉图。将结果和实验照片比较,来验证先前基于非结构网格的流动计算的正确性。结果表明:结合本文的数值光学图像与实验照片,可以对复杂流场进行更加系统深入的研究。

On the basis of the optical image principle, the computational flow imaging （CFI） can generate numerical pictures similar to experimental images such as shadowgraph, schlieren-graph and interfere-graph. In the paper, CFI is investigated and implemented. With a reconstruction of structured grids from unstructured meshes, this paper obtains numerical shadowgraphs, schlieren-graph and interfere-graph. Comparing these CFI images with the experimental photoes, numerical simulation results are validated from the computational fluid dynamics （CFD） based on the unstructured meshes. It is concluded that a combining examination of CFI images and experimental photoes helps to study complicated flow phenomena.