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A localized heating or cooling effect on stability and transition of the boundary layer flow on a sharp cone is analyzed at the Mach number 6. The mean flows are calculated using axisymmetric Navier-Stokes equations. The spatial linear stability analysis is performed for twodimensional (2D) disturbances related to the Mack second mode. The transition onset points are estimated using the e N method. In this framework, the heater or cooler may cause earlier or later transition depending on the choice of critical N -factor. Direct numerical simulations (DNS) of 2D wave propagating in the boundary layer are compared with stability results.

Stability of high-speed boundary layer on a sharp cone with localized wall heating or cooling