附面层变化规律及影响分析  

Boundary Layer Variation Rule and Influence Analysis

作　　者：许光磊 王宏伟 程鲁 孔庆珊 闫卫青 刘冶 Xu Guang-lei;Wang Hong-wei;Cheng Lu;Kong Qing-shan;Yan Wei-qing;Liu Ye(AVIC Shenyang Engine Research Institute,Liaoning Shenyang 110015)

机构地区：[1]中国航发沈阳发动机研究所,辽宁沈阳110015

出　　处：《内燃机与配件》2024年第13期138-140,共3页Internal Combustion Engine & Parts

摘　　要：进气道附面层是由于气流的黏性作用,在表面形成具有一定梯度的低速区,其中贴近壁面位置基本处于滞止状态。低速区的存在影响进气道流通面积,同时对进气道总压恢复系数、进气流量测量及整机性能造成一定影响;随着飞机飞行姿态多样化及飞行包线不断扩展,进气道附面层的存在降低发动机喘振裕度,严重时影响飞行安全。本文通过研究对附面层不同方式的测量方法,分析附面层速度分布及附面层厚度变化规律,通过计算得出对压缩部件的影响,进而评估对发动机整体性能影响。Due to the viscous action of air flow,the inlet boundary layer forms a low-speed zone with a certain gradient on the surface,in which the position close to the wall is basically in a stagnant state.The presence of low speed zone affects the flow area of the inlet,the total pressure recovery coefficient of the inlet,the inlet flow measurement and the overall performance.With the diversification of aircraft flight attitude and the continuous expansion of flight envelope,the existence of inlet boundary layer reduces the engine surge margin,which affects the flight safety in serious cases.By studying different methods of boundary layer measurement,this paper analyzes the velocity distribution of boundary layer and the variation rule of boundary layer thickness,and calculates the impact on compression components,and then evaluates the impact on the overall performance of the engine.

关 键 词：进气道 附面层 速度分布 发动机 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程]