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Volume 39 Issue 1
Jan.  2013
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Journal of Beijing University of Aeronautics and Astronautics  > 2013  >  (1): 105-108.
Zhu Yangzhu, Yi Shihe, Tian Lifeng, et al. Flow visualization of supersonic optical dome with jet[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, (1): 105-108. (in Chinese)
Citation: Zhu Yangzhu, Yi Shihe, Tian Lifeng, et al. Flow visualization of supersonic optical dome with jet[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, (1): 105-108. (in Chinese)
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Flow visualization of supersonic optical dome with jet

  • College of Aerospace and Material Engineering, National University of Defense Technology, Changsha 410073, China

  • Received Date: 28 Oct 2011
  • Publish Date: 31 Jan 2013
    Abstract
  • In the Mach 3.8 wind tunnel, fine structures in the flow field of optical dome with or without jet were studied by nano-tracer based planar laser scattering(NPLS), which has high spatiotemporal resolution. Lots of complex structures in the flow field were clearly visible, such as shock wave, expansion wave, shear layer and turbulent boundary layer. The analysis of time-correlated NPLS images revealed the temporal evolution characteristic of flow structures. The results show that most of flow above the optical window without jet cooling is laminar. The laminar zone with jet cooling is much shorter and transits to turbulence in a short distance. The transition point of the shear layer with higher pressure is closer to the injector exit, and the vortices are more complex. Compared to the former, the latter case will induce aero-optical effects even more.

     

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