10 February 2009 Flow establishment behind blunt bodies at hypersonic speeds in a shock tunnel
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Proceedings Volume 7126, 28th International Congress on High-Speed Imaging and Photonics; 71260I (2009) https://doi.org/10.1117/12.822751
Event: 28th International Congress on High-Speed Imaging and Photonics, 2008, Canberra, Australia
Abstract
An investigation of flow establishment behind two blunt bodies, a circular cylinder and a 45° half-angle blunted-cone was conducted. Unlike previous studies which relied solely on surface measurements, the present study combines these with unique high-speed visualisation to image the establishment of the flow structure in the base region. Test flows were generated using a free-piston shock tunnel at a nominal Mach number of 10. The freestream unit Reynolds numbers considered were 3.02x105/m and 1.17x106/m at total enthalpies of 13.35MJ/kg and 3.94MJ/kg, respectively. In general, the experiments showed that it takes longer to establish steady heat flux than pressure. The circular cylinder data showed that the near wake had a slight Reynolds number effect, where the size of the near wake was smaller for the high enthalpy flow condition. The blunted-cone data showed that the heat flux and pressures reached steady states in the near wake at similar times for both high and low enthalpy conditions.
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G. Park, G. Park, R. Hruschka, R. Hruschka, S. L. Gai, S. L. Gai, A. J. Neely, A. J. Neely, "Flow establishment behind blunt bodies at hypersonic speeds in a shock tunnel", Proc. SPIE 7126, 28th International Congress on High-Speed Imaging and Photonics, 71260I (10 February 2009); doi: 10.1117/12.822751; https://doi.org/10.1117/12.822751
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