进气道出口大畸变流场的模拟

SIMULATION OF FLOW FIELD WITH A LARGE DISTORTION VALUE AT OUTLET OF INLET

提出了“大板结构”模拟板的概念,并用它成功地模拟了某飞行器进气道出口大畸变流场,其畸变值最大达DC_(90)=-1.118,表明采用“大板结构”模拟板可有效地模拟大畸变流场。同时给出了板前来流M数对板后流场总压损失、流场畸变及紊流度等参数的影响,为进一步开展进气道/发动机匹配研究,发动机抗畸变能力实验研究提供了手段。

In this paper, the plate simulation for simulating a distortion flow field is developed to simulate a flow field a large distortion value at the outlet of an inled. Four flow field with large distortion values are successfully simulated by the developed plate simulator. The simulated results show that it can simulate accurately both the distortion contour maps of the steady state total pressures and large distortion values, and that the maximum among four distortion values, DC90, is about -1.118. The distortion value of the flow field simulated can be greatly increased by adding a Small radial plate on the plate simulator while the contour maps of the steady state total pressure is less change. The aerodynamic properties (such as total pressure recovery, tubulence level, distortion contour maps) of the distortion field behind the plate simulator are described.