高速气流冲击柱状泡沫多孔体的传热特性分析

Numerical investigation on heat transfer characteristic inside the cylindrical foam porous block attached to frontal surface of cylinder body with high speed flow around was performed by employing single-domain approach through integration of fluid and porous region. Radiation effect within porous region was considered based on Monte Carlo method. The influences of variable porous region length and porous drag characteristic on both the wave drag of entire model and the aero-heating effect of frontal porous region were analyzed. The results show that installation of certain length porous foam material with appropriate drag characteristic in front of the cylinder body can reduce both the wave drag of entire body and aero-heating effect of the frontal surface. Under simulation condition, the frontal foam porous with parameters (dimensionless length 1.0, viscous coefficient 0.2×10⁷m^-2 and inertial coefficient 200m^-1) can reduce 13.5% of the wave drag and approximately 75% of the frontal surface average aero-heating heat flux. With the dimensionless length being kept unchanged, the wave drag was decreased with the decline of inertial coefficient of foam porous region, whereas the aero-heating flux of frontal surface was slightly increased.