发动机导叶和涡轮叶片性能衰退的数值研究

摘要

Aim at some ingredients leading to typical component performance deterioration-regulative deviation of guide vane, blade roughness increase, profile change and tip clearance increase, computational model of fan and turbine were established, the token of performance deterioration was perfected, the effect of some ingredients on floating field and change of main performance parameters was analyzed.The results indicate, the ingredients influence work performance of fan and turbine, and decreases performance parameter. The results provide a basis for maintenance and adjustment of components after deterioration.%针对导致发动机典型部件性能衰退的多个主要因素———导流叶片调整偏差、叶片粗糙度增大、叶型改变和叶顶间隙增加，基于流场仿真技术，建立了风扇和涡轮的计算模型，完善性能衰退表征方法，分析了多种因素对其气流流场的影响以及主要性能参数的变化规律。结果表明：导流叶片角度调整偏差、叶片粗糙度增加、叶型改变等因素影响风扇和涡轮的工作性能，降低其性能参数。所得结果为深入研究制定相应部件性能衰退后的维护调整措施奠定基础。