Experimental Study of Supersonic Jet Flow Using DPIV
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摘要: 介绍了采用数字式互相关粒子图像测速系统(DPIV)在测量超音速喷流实验中的应用;实验给出了设计马赫数Ma=1.5的小型拉瓦尔喷管在不同总压和反压比条件下,喷流速度场、流线、涡量分布等定量信息.实验结果显示出流场中激波前后流体速度,涡量分布的明显变化,波系的结构和不同于一维管流的流动特性.Abstract: Experimental study of supersonic jet flow using digital PIV system with frame straddle CCD camera is introduced in the paper. The diameter and Mach number of the Laval nozzle exit are 13.8mm and 1.5 respectively, the vector field and wave patterns of the jet flow in different pressure ratio of the stagnation pressure with the surrounding static pressure were observed. The results show the different of flow speed and other parameter of flow field before and after the shock wave. The generation of particles and seeding method are also simply described in the paper.
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Key words:
- cross-correlation /
- supersonic jets /
- shock waves /
- digital particle image velocimetry
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[1] Alkislar M B,Lourenceo L, Krothapalli A. 3-D PIV measurements of a supersonic jet ．Proc of the 3rd International Workshop on PIV'99 ．CA,Santa Barbara, US:Univ of California Santa Barbara,1999． [2] Bernero S,Fiedler H E. Simultaneous PIV and LIF experiments on a round jet in counterflow ． Proc 1st Int Symp on Turbulence and Shear Flow Phenomena .CA,Santa Barbara, US:Univ of California Santa Barbara,1999． [3] Bernero S,Fiedler H E. Experimental investigations of a jet in counterflow . 7th European Turbulence Conference(ETGF) Saint Jean Cap Ferrat . France, European Mechanics Society, 1998.35~38. [4] Ross C,Lourenceo L,Krothapalli A. PIV measurements in a shock-containing supersonic flow . AIAA paper 94-0047,1994. -
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