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中文摘要：
将由时间模式直接数值模拟（TDNS）得到的充分发展湍流流场，以适当方式转换成空间模式直接数值模拟（SDNS）的入口流场，通过在入口处引入包含湍流信息的扰动来仿真湍流发生器。分析了添加扰动的位置和幅值大小对流场的影响，研究了带有三个压缩折角的高超声速飞行器下表面发生强迫转捩的可能性。研究结果表明，对于本文所选择的高超声速飞行器下表面模型，在一定的条件下，第一、二和三个坡道内均有可能发生强迫转捩。
英文摘要：
The flow field obtained by using Temporal Direct Numerical Simulation for fully developed tur- bulent flow can be used as the inflow of Spatial Direct Numerical Simulation with a proper transformation. This method is applied to simulate the turbulence generator by introducing turbulent disturbance at the inlet, and the effects of the adding position and the disturbance amplitude are analyzed to study the possibility of bypass transition on the lower surface of a hypersonic flight vehicle with three compression corners. The re- sults show that, it is likely possible to lead bypass transition in the first, second and third ramp under certain conditions.
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