基于冷态叶型生成叶片加工坐标的方法

建立了基于冷态叶型生成叶片加工坐标的方法，包括排序、插值加密、叠加位移量、去倒圆及端区叶型拟合等步骤.以某多级轴流压气机为例，应用该方法生成的加工坐标叶片除端区外主流通道叶高内误差在0.01mm以下，叶片表面波纹度和前后缘曲率良好.通过进口级的数值模拟表明:该方法生成的加工坐标叶片与冷态叶型的误差对气动性能影响小，流量-总压比-等熵效率特性变化微小，叶片进出口气流速度、方向及流场细节等变化较小，满足工程应用的需求. 

Method of generating airfoil manufacturing coordinates based on cold airfoil

Method of generating airfoil manufacturing coordinates based on cold airfoil was proposed. It comprised of ordering, interpolating, adding location bias, removing endwall fillet, and fitting endwall airfoil. This method was used to generate multistage axial compressor blade manufacturing coordinates. The difference between manufacturing coordinates and the cold airfoil below 0.01mm except near endwall section was found. Both the waviness of blade surface and curvature of leading or trailing edges were acceptable. Numerical results show the difference between manufacturing coordinate airfoil and cold airfoil has less impact on aerodynamic performance. Mass flow versus total pressure ratio and isentropic efficiency characteristics change little. Besides, flow velocity and flow angle of blade row inlet and outlet, and the detailed flow field have almost no changes. This method can be applied for generating airfoil manufacturing coordinates.