On the determination of the position of laminar-turbulent transition in boundary layer by optical methods
D.A. Bountin, Yu.V.
Gromyko, A.A. Maslov, P.A. Polivanov, and A.A. Sidorenko
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
E-mail: bountin@itam.nsc.ru
Keywords: optical flow diagnostics methods, laminar-turbulent transition, schlieren visualization, heat flux
Pages: 767–770
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 tran-sition are obtained. These data can be used
in the future as reference ones while calibrating semi-empirical
calculation models for the transition.
DOI: 10.1134/S0869864315060128
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