Numerical analysis for correlation of standard model testing in high enthalpy facility and flight test

There exits the nonequilibrium freezing of the species and vibrational energy , resulting from the rapid expansion of the nozzle flow in high enthalpy facilities. So the data of wind tunnel simulation are full of difficulties with the analysis, extrapolation and use. In present paper, a blunt cone, referred to as ELECTRE, from which flight data exits, has been selected as the standard model for reference testing in hypersonic facilities. The analysis of the extrapolation to flight is done by simulating numerically the flowfields over the standard model under the conditions of the flight and the corresponding experimental simulation in the high enthalpy facility with a thermal and chemical nonequilibrium NavierStokes code. The binary scaling parameter ρL and Stanton number hasbeen taken into account. The result shows that the extrapolation to flight of the heat transfer rate by using the binary scaling and by keeping the total enthalpy the same, is only feasible in the nose region where the dissociation reactions are predominant. For the conical aft part of the standard model large differences in Stanton are observed and binary scaling becomes less accurate. Finally the use of CFD for the design of the experimental conditions has been demonstrated by identifying the regions within the wind tunnel envelope where real gas effects significantly change the heat transfer rate distribution.