近年，計算手法や計算機能力の進歩に伴い，CFD（数値rn流体力学）により様々な流れをシミュレーションすることがrn可能となっている．しかし極超音速流れの数値シミュレーrnションでは，しばしば“カーバンクル現象”に代表されるrn衝撃波不安定性が視れ，正しくない解に到達することがあrnる．%It is still challenging to predict surface heat-transfer rate in hypersonic flow computations. In this paper, we first performed numerical experiments by changing numerical flux functions and meshes for a hypersonic flow around a hemisphere. Results show that AUSM+ flux function by Liou (1996) on a carefully refined mesh can lead to a shock stable solution with an accurate aerodynamic heating on the surface. Then, a numerical simulation on a hypersonic flow around two bodies involving a shock/shock interaction and a boundary-layer separation has been conducted by using the same method. Although this is a rather difficult problem with a complicated fiowfield, comparisons show good agreement with the corresponding experimental data, including the surface heat-transfer rate profile. Therefore, we can say that we have established a numerical method to accurately predict surface heat-transfer in hypersonic shock interacting flows. Finally, detailed analysis of the computed fiowfield has been made.
展开▼
