Supersonic boundary layer transition induced by self-sustaining dual jets

doi:10.1088/1674-1056/ab5ef7

中国物理B ›› 2020, Vol. 29 ›› Issue (1): 14704-014704.doi: 10.1088/1674-1056/ab5ef7

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Supersonic boundary layer transition induced by self-sustaining dual jets

Qiang Liu(刘强), Zhenbing Luo(罗振兵), Xiong Deng(邓雄), Zhiyong Liu(刘志勇), Lin Wang(王林), Yan Zhou(周岩)

1 College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;
2 China Aerodynamic Research and Development Center, Mianyang 621000, China

收稿日期:2019-06-23 修回日期:2019-10-16 出版日期:2020-01-05 发布日期:2020-01-05
通讯作者: Zhenbing Luo, Xiong Deng E-mail:luozhenbing@163.com;badi_arg@126.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11602299, 11872374, and 51809271).

Supersonic boundary layer transition induced by self-sustaining dual jets

Qiang Liu(刘强)¹, Zhenbing Luo(罗振兵)¹, Xiong Deng(邓雄)¹, Zhiyong Liu(刘志勇)^1,2, Lin Wang(王林)¹, Yan Zhou(周岩)¹

1 College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;
2 China Aerodynamic Research and Development Center, Mianyang 621000, China

Received:2019-06-23 Revised:2019-10-16 Online:2020-01-05 Published:2020-01-05
Contact: Zhenbing Luo, Xiong Deng E-mail:luozhenbing@163.com;badi_arg@126.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11602299, 11872374, and 51809271).

摘要/Abstract

摘要： To promote high-speed boundary layer transition, this paper proposes an active self-sustaining dual jets (SDJ) actuator utilizing the energy of supersonic mainflow. Employing the nanoparticle-based planar laser scattering (NPLS), supersonic flat-plate boundary layer transition induced by SDJ is experimentally investigated in an Ma-2.95 low-turbulence wind tunnel. Streamwise and spanwise NPLS images are obtained to analyze fine flow structures of the whole transition process. The results reveal the transition control mechanisms that on the one hand, the jet-induced shear layer produces unstable Kelvin-Helmholtz instabilities in the wake flow, on the other hand, the jets also generates an adverse pressure gradient in the boundary layer and induce unstable streak structures, which gradually break down into turbulence downstream. The paper provides a new method for transition control of high-speed boundary layer, and have prospect both in theory and engineering application.

关键词: supersonic boundary layer transition, self-sustaining dual jets, nanoparticle-based planar laser scattering (NPLS), vortex structures

Abstract: To promote high-speed boundary layer transition, this paper proposes an active self-sustaining dual jets (SDJ) actuator utilizing the energy of supersonic mainflow. Employing the nanoparticle-based planar laser scattering (NPLS), supersonic flat-plate boundary layer transition induced by SDJ is experimentally investigated in an Ma-2.95 low-turbulence wind tunnel. Streamwise and spanwise NPLS images are obtained to analyze fine flow structures of the whole transition process. The results reveal the transition control mechanisms that on the one hand, the jet-induced shear layer produces unstable Kelvin-Helmholtz instabilities in the wake flow, on the other hand, the jets also generates an adverse pressure gradient in the boundary layer and induce unstable streak structures, which gradually break down into turbulence downstream. The paper provides a new method for transition control of high-speed boundary layer, and have prospect both in theory and engineering application.

Key words: supersonic boundary layer transition, self-sustaining dual jets, nanoparticle-based planar laser scattering (NPLS), vortex structures

中图分类号: (Boundary layer control)

47.85.ld

47.40.Ki (Supersonic and hypersonic flows) 47.80.Jk (Flow visualization and imaging) 47.27.De (Coherent structures)

刘强, 罗振兵, 邓雄, 刘志勇, 王林, 周岩. Supersonic boundary layer transition induced by self-sustaining dual jets[J]. 中国物理B, 2020, 29(1): 14704-014704.

Qiang Liu(刘强), Zhenbing Luo(罗振兵), Xiong Deng(邓雄), Zhiyong Liu(刘志勇), Lin Wang(王林), Yan Zhou(周岩). Supersonic boundary layer transition induced by self-sustaining dual jets[J]. Chin. Phys. B, 2020, 29(1): 14704-014704.

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Supersonic boundary layer transition induced by self-sustaining dual jets

Supersonic boundary layer transition induced by self-sustaining dual jets

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