A localized heating or cooling effect on stability and transition of the boundary layer flow on a sharp cone at zero angle of attack and free-stream Mach number 6 is analyzed. Experiments were carried out in the Transit-M wind tunnel of Institute of Theoretical and Applied Mechanics (Novosibirsk, Russia) for different heating/cooling intensities and free-stream Reynolds numbers. The mean flows with localized heating/cooling are calculated using axisymmetric Navier-Stokes equations. These solutions are used for the spatial linear stability analysis to estimate the transition onset points using the e~N method. Direct numerical simulations of 2D-distirbances propagating in the boundary layer through the cooled/heated region are performed. The results of stability analysis and numerical simulations are compared with experiments.
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