Study of heat-transfer coefficient on hypersonic boundary layer flow over a flat

Abstract eng:
Method of computing convective heat transfer coefficient is examined by the numerical study on hypersonic boundary layer flow over a flat plate. For the similar solutions existing in hypersonic boundary layer flow for the variable specific heat, the heat flux on isothermal wall is calculated and being served as a standard to examine the accuracy of the method. The results showed that reference enthalpy method is more applicability than reference temperature method for variable specific heat. Then, using the formula above as the wall temperature condition, the DNS is conducted from an initially given temperature to adiabatic temperature for one meter long flat with incoming flow Mach number 4.5. According to the calculation results, we found that the temperature and heat flux on the wall associated with time and distance to the flat front edge.

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