wind tunnel experiment Applied Primarily of Focusing Schiliren Visualization System in the Shock Wind Tunnel
For the sake of satisfying with the quantitative measurement of flow density, 3D flow and large field flow visualization, the focusing schlieren system has been developed in the shock tunnel. The system has the characteristic of focusing on some plane, and the information gotten from the flow by the system is mainly decided by the focusing plane. The technique introduced in this paper includes the theory, the composition, the debug and the result of tunnel test. Test results show that: (1) The sensitivity of the system is high, and the image gotten by the system is clear and not disturbed by the diffraction and interference when the light source is laser; (2) The system can get the image at the condition that the sharp focus depth is less than 5mm, the measurement field diameter is about 100mm, the system can get the focusing image of different plan by changing the place of image plane; (3) Gray degree between the static and dynamic focusing schilieren image will give the important data for quantitative test of flow density.
Focusing schlieren Flow visualization Shock tunnel Schlieren Quantitative measurement
XIE Ai-min XU Xiang HUANG Jie LV Zhi-guo SONG Qiang LIU Sen ZHENG Lei
Hypervelocity Aerodynamics Institute, China Aerodynamics R&D Center, Mianyang, 621000, China
国际会议
The 8th Sino-Russia High-speed Flow Conference(第八届中俄高超声速流体力学研讨会)
上海
英文
387-394
2011-11-21（万方平台首次上网日期，不代表论文的发表时间）