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Robust and efficient computation of turbulent flows around civil transport aircraft at flight Reynolds numbers

机译：雷诺数下民航飞机周围湍流的鲁棒高效计算

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摘要

This work aims at providing numerical methods that enable the robust and efficient simulation of turbulent flows around civil transport aircraft configurations at flight Reynolds numbers. Robustness problems related to the multigrid treatment of advanced transport equation turbulence models have been identified preventing convergence of simulations at high or flight Reynolds numbers. Therefore the application of multigrid to the turbulence equations is omitted while the multigrid treatment of the mean flow equations stays unchanged. Moreover, a fully implicit time integration scheme - a DDADI approach - is applied to the turbulence equations. The new approach raised robustness to a sufficient level to converge viscous computations at flight Reynolds numbers. Furthermore, the convergence speed of aerodynamic coefficients for three dimensional applications has also been improved significantly.
机译：这项工作的目的是提供数值方法，从而能够以雷诺数为单位对民航飞机构型周围的湍流进行鲁棒而有效的仿真。已经确定了与高级运输方程湍流模型的多网格处理有关的鲁棒性问题，从而阻止了高雷诺数或飞行雷诺数下的模拟收敛。因此，在平均流方程的多重网格处理保持不变的情况下，省略了将多重网格应用于湍流方程。此外，将完全隐式时间积分方案-DDADI方法-应用于湍流方程。新方法将鲁棒性提高到足够的水平，以在飞行雷诺数时收敛粘性计算。此外，在三维应用中，空气动力学系数的收敛速度也得到了显着提高。

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