叶根倒角对跨音轴流压气机气动性能的影响*

为了获得叶根倒角对跨音轴流压气机气动特性影响规律，研究充分考虑了加工工艺及气动影响两方面，用倒角半径及最小角度两个参数确定倒角几何。研究基于Rotor37分析倒角参数对叶片几何的影响，并从整体性能及内部流场细节两方面对转子气动特性变化进行详细分析，获得了倒角参数变化对气动性能的影响规律。研究结果表明，相对于最小角度，倒角半径是影响转子性能的主要因素;倒角的存在不仅使得叶片根部马蹄涡的分布发生改变，且影响了出口通道涡的强度和尺度。此外倒角存在改变了叶根处的压力分布，使得前缘来流附面层有所增厚，导致根部的做功能力及转子性能下降。

Influence of Blade-root Fillet on Transonic Rotor Performance

Considering the influence of manufacturing and aerodynamic performance, the fillet is defined using dual-parameters (radius and minimum angle) and the research has been done to get the influence of fillet on transonic rotor performance based on Rotor37.The research firstly analysis the influence of fillet parameters on blade geometry and then shows the influence of different fillet parameters on aerodynamic performance by comparing the differences in overall performance and intern flow field. The effect rules of fillet parameters on aerodynamic performance shows the fillet radius is the main factor in terms of rotor performance compared to minimum angle. The fillet changes the distribution of horseshoe vortex near root of blade and the scale and strength of outlet passage vortex is altered. Besides, the fillet changes the distribution of pressure near root of blade and thickened the boundary layer near the leading edge, resulting in the degradation of rotor performance and capacity of work.