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不断提高涡轮增压器的性能是历史性的要求。今天的发动机制造商需要压比为 5或大于 5而且总效率大于 70 %的涡轮增压器。本文探讨了如何使用计算流体动力学开发新型涡轮增压器NAPIER 2 97,描述了影响增压器性能的各个方面及各方面典型的效率损失 ,同时还表明了各种不同的计算流体动力学 (CFD)软件包如何用来分析增压器设计中的一些重要的空气动力学元件(包括压气机叶轮、轴流涡轮叶栅和涡轮壳 )。文中说明了NAPIER 2 97型增压器如何设计才能满足发动机制造商的不同要求 ,具体是 ,对固定式发动机 ,怎样实现增压器在高压比时具有最高效率 ;对具有螺旋桨特性的发动机 ,怎样实现增压器在低压比时具有最高效率。
Continued to improve the performance of the turbocharger is a historic requirement. Today’s engine manufacturers need turbochargers with a pressure ratio of 5 or more and a total efficiency of more than 70%. This paper explores how to develop a new turbocharger, NAPIER 2 97, using computational fluid dynamics, describing typical aspects of the turbocharger performance and various aspects of efficiency losses, and also shows the various computational fluid dynamics CFD) software package is used to analyze some of the key aerodynamic components of turbocharger designs, including compressor impellers, axial turbine cascades, and turbine casings. This article explains how the NAPIER 2 97 turbocharger is designed to meet the different requirements of the engine manufacturer, specifically how to achieve the highest efficiency of the turbocharger at high pressure ratios for stationary engines and how to deal with turboprop engines Turbochargers achieve maximum efficiency at low pressure.