Experimental investigation on transverse jet penetration into a supersonic turbulent crossflow
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- 作者：MingBo Sun (1)
ShunPing Zhang (1)
YanHui Zhao (1)
YuXin Zhao (1)
JianHan Liang (1) - 关键词：supersonic flow ; transverse jet ; penetration ; nanoparticle ; based planar laser scattering (NPLS)
- 刊名：SCIENCE CHINA Technological Sciences
- 出版年：2013
- 出版时间：August 2013
- 年：2013
- 卷：56
- 期：8
- 页码：1989-1998
- 全文大小：1225KB
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ShunPing Zhang (1)
YanHui Zhao (1)
YuXin Zhao (1)
JianHan Liang (1)
1. Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha, 410073, China
文摘
The paper evaluates the evolvement of coherent structures and penetration height of gaseous transverse jet penetration into a supersonic turbulent flow. The high spatiotemporal resolution coherent structures of the jet plume are obtained by utilizing the nanoparticle-based planar laser scattering technique (NPLS). The evolving pattern of the coherent structures generated on the upwind surface of the transverse jet is analyzed based on the NPLS images. The shedding eddies from the jet near-field have lower convection velocity along freestream direction, while vortex growth rate is apparently higher than the far-field. Farther downstream, the large-scale eddies have less deformation and translate at velocities near the freestream velocity. Thus the near-field determines the scale of eddies in the far-field and affects the whole mixing process. The effect of injection stagnation pressure on the coherent structures is discussed and a modified penetration correlation is proposed based on an edge approximation definition and least square method with various injection pressures.