基于体积力模型的1维涡轮特性评估方法

涡轮低维气动特性评估方法的预测精度对涡轮气动设计有重要意义.基于适用于轴流涡轮特性评估的1维体积力方法,分析和局部调整了Adam和Leonard的1维体积力模型中的叶片力源项和离心力源项,并在特性计算中引入涡轮损失模型.通过1个低压涡轮和1个含冷气高压涡轮对该方法进行验证,计算结果表明:该方法对2个算例在涡轮设计工况点的流量效率预测偏差均在1％以内,且能够反映涡轮气动特性随膨胀比的变化趋势,具有良好的精度,可用于快速可靠地评估涡轮低维气动特性.

A One-Dimensional Simulation Method to Evaluate Turbine Performance Based on Body Forced Model

The precision of turbine aerodynamic performance of low dimensional evaluation method is of great significance for the turbine aerodynamic design. A one-dimensional simulation method for axial flow turbine based on body force model was studied, the blade force source term and centrifugal force source term in Adam and Leonard body force model were corrected, the turbine loss models were introduced in the computation. The method was verified by a low pressure turbine and an air cooling high pressure turbine, and the results show that efficiency deviation of two examples turbine at design point is within 1%. In addition, the results can reflect the tendency for aerodynamic performance of the turbine with the expansion ratio variation. All in all, the corrected body force model has a good precision, and can be used as a fast and reliable evaluation method of low dimensional gas turbine performance.