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Laminar-turbulent flow over wedges mounted on sharp and blunt plates

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Abstract

The flow pattern and the heat transfer on sharp and blunt flat plates near a wedge in a Mach 6 stream are experimentally investigated for two Reynolds numbers corresponding to the laminar and transitional states of the undisturbed boundary layer ahead of the wedge. It is shown that, as in a two-dimensional flow, plate bluntness leads to the attenuation of the heat transfer in the boundary layer/shock wave interference zone. However, when a certain threshold value of the bluntness is exceeded, a further increase in the bluntness has almost no effect on the heat transfer. For the first time, an experiment conducted in an intermittent (blow-down) wind tunnel has been based on the comprehensive use of panoramic (global) techniques for measuring the heat transfer and pressure coefficients and a method for visualizing the surface friction employing the luminescence effect after UV irradiation.

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Authors
  1. V. Ya. Borovoy
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  2. V. N. Mosharov
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  3. A. Yu. Noev
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  4. V. N. Radchenko
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Additional information

Original Russian Text © V.Ya. Borovoy, V.N. Mosharov, A.Yu. Noev, V.N. Radchenko, 2009, published in Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, 2009, Vol. 44, No. 3, pp. 58–74.

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Borovoy, V.Y., Mosharov, V.N., Noev, A.Y. et al. Laminar-turbulent flow over wedges mounted on sharp and blunt plates. Fluid Dyn 44, 382–396 (2009). https://doi.org/10.1134/S0015462809030065

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