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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (1): 98-119.doi: 10.7527/S1000-6893.2014.0230

• Experiments and Numerical Simulations • Previous Articles     Next Articles

Progress on experimental techniques and studies of hypersonic/supersonic flows

YI Shihe, CHEN Zhi, ZHU Yangzhu, HE Lin, WU Yu   

  1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2014-06-04 Revised:2014-10-08 Online:2015-01-15 Published:2014-10-09
  • Supported by:

    National Natural Science Foundation of China (11172326); National Basic Research Program of China (2009CB724100)

Abstract:

The research of flows associated with the hypersonic aircraft has aroused more and more attention. Experimental techniques and wind tunnel designing methods are challenged when applied to these flows, due to the unstableness, intensive gradients and compression effects. Supersonic nano-tracer planar scattering (NPLS) technique is a non-intrusive optic measuring method proposed by the author's research group. It can reveal structures of a transient cross-section of supersonic three-dimensional flow field at high spatial and temporal resolution. In this paper, techniques are introduced including NPLS, density measurement, Reynolds stress measurement, aero-optic wavefront measurement based on NPLS. Applications of these techniques on supersonic boundary layer, supersonic mixing layer, supersonic compression-corner flow, shock/boundary layer interaction and supersonic flow passing over an optic cowl are reviewed. Typical flow structures such as boundary layer, mixing layer and shock wave are revealed along with the corresponding temporal evolution characteristics. In addition, to simulate and study the nature transition of boundary layer in the atmospheric conditions and to study supersonic mixing layer transition, the design of hypersonic quiet wind tunnel and supersonic mixing layer wind tunnel are introduced along with the laminarized nozzle designing.

Key words: supersonic flow, aero-optics, shock waves, boundary layer, hypersonic quiet wind tunnel, nano-tracer planar scattering technique

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