空气涡轮起动机优化设计和匹配特性

Optimization Design and Matching Performance of Air Turbine Starter

为改善某型空气涡轮起动机的性能,并使其与辅助动力装置的引气特性匹配,采用数值仿真和试验相结合的方法,开展了某型空气涡轮起动机气动性能和流场细节的研究,并完成了导向器和涡轮级叶型优化设计,改型后涡轮流量增大了23.2%,效率提升了3.4%,功率增加了18.0%。数值仿真和试验结果的对比表明,流量整体差别较小,波动范围在±3%以内,均值为0.17%;功率差别最大为2.38%,最小为0.1%,符合性较好。数值仿真结果表明,空气涡轮起动机改型后与辅助动力装置的引气特性线存在共同工作点,实现了两者的匹配工作,改善了辅助动力装置的工作状况。

In order to improve the performance of an air turbine starter and match it with the bleed characteristics of the auxiliary power unit,the aerodynamic performance and flow field details of the air turbine starter are studied by means of numerical simulation and experiment,and the optimal design of the guide and turbine stage blade is completed.After the modification,the mass flow,the efficiency and the power increase by 23.2%,3.4%and 18.0%,respectively.The comparison between numerical simulation and test results shows that the overall difference of flow is small,the fluctuation range is within±3%,and the mean value is equal to 0.17%.The maximum power difference is equal to 2.38%and the minimum is equal to 0.1%.The numerical simulation results show that there are common working points between the modified air turbine starter and the bleed characteristic line of the auxiliary power unit,and the working performance of the auxiliary power unit has been significantly improved.