几何尺寸对高超声速进气道气动性能的影响

doi:10.7527/S1000-6893.2013.0459

Abstract

Abstract:

To investigate the effects of size construction ratio of model on hypersonic inlet's aerodynamic performances, numerical simulation for hypersonic inlet model with different size construction ratios was carried out. The results indicated that as the construction ratio increased, the total-pressure recovery coefficient, Mach number and the mass flow coefficient of inlet isolator's exit all raised while the static pressure ratio declined. And the trend is more apparent at higher free-stream Mach number. Theoretical analysis and numerical simulation show that the illustrated phenomenon is mainly attributed to the change of the relative thickness of boundary layer at different conditional Reynolds numbers. Through the theoretical analysis on the quantitative correlation between the total-pressure recovery coefficient and the size construction ratio, as for the inlet model investigated in this paper, when the relative thickness of boundary layer decreased by 1%, the total pressure recovery coefficient of inlet isolator's exit would increase by about 0.7%.

Key words: hypersonic inlet, scale ratio, grid divisions, numerical simulation, relative thickness of boundary-layer, total-pressure recovery coefficient

CLC Number:

V231
O354.4

WANG Yagang, YUAN Huacheng, GUO Rongwei. Effect of Geometric Dimensions on Aerodynamic Performance of Hypersonic Inlet[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(7): 1893-1901.

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Effect of Geometric Dimensions on Aerodynamic Performance of Hypersonic Inlet

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