Mach 6 Wake Flow Simulations Using a Large-Eddy Simulation/Reynolds-Averaged Navier–Stokes Model
Mach 6 Wake Flow Simulations Using a Large-Eddy Simulation/Reynolds-Averaged Navier–Stokes Model
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DOI：
10.2514/1.a32729
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发表时间：
2014-08
影响因子：
1.6
通讯作者：
Giovanni Salazar;J. Edwards
中科院分区：
文献类型：
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作者：
Giovanni Salazar;J. Edwards
采用大涡模拟/雷诺平均Navier-Stokes湍流模型对类似于美国宇航局猎户座多用途乘员飞行器的比例模型进行了马赫数6的混合模拟。表面压力和传热的结果进行了比较，从以前的基本流实验在卡尔斯潘大学布法罗研究中心进行的实验数据。使用最高雷诺数的测试情况下（11×106胶囊直径的基础上），不同的数值方面的混合方法，如使用低耗散方案，修改的涡粘性混合函数，时间平均结果，过滤计算结果，和网格分辨率的敏感性。此外，结果进行了比较，与Menter的两方程基线模型和分离涡模拟预测的雷诺平均Navier-Stokes方程。通过引入一种新的修正方法，将雷诺平均的Navier-Stokes方程与边界层内的大涡模拟相结合，得到了很好的一致性。
A hybrid large-eddy simulation/Reynolds-averaged Navier–Stokes turbulence model is used to simulate the Mach 6 flow around a scaled model similar to NASA’s Orion multipurpose crew vehicle. The results for surface pressure and heat transfer are compared with experimental data from previous base flow experiments conducted at the Calspan—University at Buffalo Research Center. Using the highest Reynolds number test case (11×106 based on capsule diameter), different numerical aspects of the hybrid approach are addressed, such as use of a low-dissipation scheme, a modification to the eddy-viscosity blending function, time-averaging results, filtering computational results, and sensitivity to grid resolution. In addition, results are compared with Reynolds-Averaged Navier–Stokes using Menter’s two-equation baseline model and to detached-eddy simulation predictions. By introducing a new modification to the blending from Reynolds-averaged Navier–Stokes to large-eddy simulation within boundary layers, very good agr...