Application of dual-section focusing schlieren visualization system

In a strut wake visualization experiment,the feasibility of characterizing complex flow fields by a dual-section focusing schlieren technique was verified.The dual-section focusing schlieren technique can get two images in the same run simultaneity.By comparing the schlieren and focusing schlieren images of three-dimensional flow structures,it is showed that the dual-section focusing schlieren system has potentiality in characterizing complex flow fields.In the future work,it should be done to reduce the depth-of-focus and improve the image quality to finely characterize complex flow fields.