对带外涵的某型核心机空气流量确定的数值分析与试验研究

Numerical and Experimental Study of the Air Flow Determination of a Core Engine with By-pass Duct

本文针对某型核心机地面台和高空台试验中空气流量测量不一致的问题,对核心机进口流场进行了数值计算与分析。结果表明,距核心机内涵进口导流盆前缘1.20D～1.45D范围内的截面静压分布较为均匀。该核心机地面台和高空台试验中空气流量测量结果的差异,主要是由空气流量测量截面静压沿径向分布不均匀引起的。调整该测量截面后的数值分析与试验结果一致,而且消除了地面台和高空台试验中空气流量测量结果的差异现象。

In this paper, the flow field of the core engine inlet was numerically calculated to solve the problem of air flow measurements in Altitude Test Facility not consistent with ground test. The results showed the static pressure was fair even at a distance between 1.20D and 1.45D from the front edge of the guide disk. The problem was found from the unequal distribution of the static pressure along radial direction at the measurement section. The numerical analysis was consistent with experimental results by adjusting the measuring section, and the problem was solved.