On the determination of the position of laminar-turbulent transition in boundary layer by optical methods |
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Authors: | D. A. Bountin Yu. V. Gromyko A. A. Maslov P. A. Polivanov A. A. Sidorenko |
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Affiliation: | 1.Khristianovich Institute of Theoretical and Applied Mechanics SB RAS,Novosibirsk,Russia |
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Abstract: | As a rule, aerodynamic studies at hypersonic flow velocities are carried out in short-duration wind-tunnel facilities. For such facilities, optical diagnostic methods are most preferable. In the present study, we give for the first time a comparison of two methods for determining the end of laminar-turbulent transition: from the distribution of heat fluxes and from schlieren visualization data for the boundary-layer flow. Parametric data on the position of the transition are obtained. These data can be used in the future as reference ones while calibrating semi-empirical calculation models for the transition. |
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