关键词: 渗透边界模型；内转式进气道；启动性能；数值分析

Abstract: Inlet’s porous bleed system always contains a lot of holes，these holes’ grid preparation is extremely complicated，it’s hard to resolve each discrete hole and simulate through Computational Fluid Dynamics(CFD). In order to avoid these problems，CFD software AHL3D which integrated the fixed-exit bleed model(FEBM) was used to simulate porous bleed system. An inward turning inlet’s starting performance at a range of Ma4～6 was achieved using bleed holes. The results indicate that，under the same condition，the pressure ratio distribution of inlet’s body-side derived from FEBM is the same with porous bleed system. The maximum difference of flow parameter at throat is below 1.5%，which demonstrated that it’s practical to use FEBM to evaluate the influence of porous bleed system to inlet’s starting performance. When the bleed region located near the peak pressure point of separation bubble ，the inlet could be started at a wide Mach number range from 4 to 5.5. When Mach number is 5，the plate porosity is about 0.1，the inlet could be started and the minimal mass flux bleed ratio is below 1%. While the porous bleed system plenum pressure is 6.5 times the far-field pressure，the inlet is started and the minimal mass flux bleed ratio is almost 0，the pressure ratio distribution agrees well with the result from flow-field derived from far-field initial method.

Key words: Fixed-exit bleed model；Inward turning inlet；Starting performance；Numerical analysis