Heat Transfer Behind a Step in High-Enthalpy Laminar Hypersonic Flow

摘要

THIS Note describes features associated with heat transfer in anseparated flow in a high-Mach-number hypersonic flow in low-nto-moderate enthalpy range. A simple flow geometry of a rearwardnfacing step (Fig. 1) is considered for analysis. It is assumed that thenstep height is small and the separating boundary layer is comparablento step height. Under these circumstances, the hypersonic smallndisturbance theory is assumed applicable for the flow at the step.nHerein, we propose parameters to describe heat transfer behind anstep in high-enthalpy laminar hypersonic flow.nThe enthalpy range consideredwas 1:5MJ=kg u0001 ho u0001 26 and thenMach number range 6 6 u0001 M1 u0001 10. The Reynolds numbers werenalso moderate, with unit Reynolds numbers being less than 106npernmeter. It is shown that under these conditions, the flow at the step isndominated mainly by viscous effects and that real gas effects arenminimal.