Shadowgraph imaging and post-processing for hypersonic boundary layer transition in ballistic range

被引：0

作者：

Wang, Zonghao ^{[1
]}

Liu, Sen ^{[1
]}

Xie, Aimin ^{[1
]}

Huang, Jie ^{[1
]}

机构：

[1] Hypervelocity Aerodynamics Institute, China Aerodynamics Research & Development Center, Mianyang

来源：

Journal of Flow Visualization and Image Processing | 2015年 / 22卷 / 04期

关键词：

Ballistic range test; Boundary layer transition; Hypersonic; Post-processing; Shadowgraph;

D O I：

10.1615/JFlowVisImageProc.2016016555

中图分类号：

学科分类号：

摘要：

To meet the research needs of hypersonic boundary layer transition, high-resolution shadowgraph imaging and post-processing technology have been developed in the hypervelocity ballistic range at the Hypervelocity Aerodynamics Institute, China Aerodynamics R. & D. Center (CARDC). It was applied in the hypersonic boundary layer transition measurements in the free-flight ballistic range. The test model was a 5o half-cone with skirt and 110 mm in length. The flight Mach number was 5.76, the unit Reynolds number was 8.82 × 108 m–1, and the attack angle was 0.2o. An image of a boundary layer with laminar-to-turbulent transition was obtained, from which the burst and breakdown of a turbulence spot, relaminarization, and reseparation were observed. A post-processing technique was developed based on the frequency spectrum analysis of the greyscale image, and the evolution characteristic of destabilization and eddy was worked out. © 2015 by Begell House, Inc.

引用

页码：229 / 238

页数：9

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