Acta Photonica Sinica, Volume. 48, Issue 10, 1001003(2019)
Influence of Pressure of Jet on Hypersonic Flow Field Modulation Transfer Function
An aero-optical ground test platform based on the hypersonic (Ma= 6.0) gun tunnel was built. The test object was an optical dome model with cooling jet structure. Combined with background oriented schlieren technology, a high-speed camera was used to obtain the light deflection information of the flow field with five different pressure of jet value: 0, 04, 1.0, 1.16 and 1.8. And the corresponding modulation transfer function was calculated with the geometric optics theory. The experimental results show that the increase of pressure ratio of jet value can reduce the envelope area of the modulation transfer function of the flow direction and span direction. The flow direction modulation transfer function fluctuates between 2~ 4 lp/mm under larger pressure ratio of jet value.
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ZHAO Xin-hai, YI Shi-he, DING Hao-lin, OU-YANG Tian-ci, SHI Yang. Influence of Pressure of Jet on Hypersonic Flow Field Modulation Transfer Function[J]. Acta Photonica Sinica, 2019, 48(10): 1001003
Received: May. 10, 2019
Accepted: --
Published Online: Nov. 14, 2019
The Author Email: Xin-hai ZHAO (1873129527@163.com)