【摘要】 在传统的涡轮效率测量方法的基础上,提出了一种效率测量的新方法,这种新方法采用辅助增压器来替代传统的冷却器实现压气机的自循环加载。利用一维仿真计算和试验的手段对这一新方法的可行性进行了模拟计算,试验和计算结果表明这一新方法较之于传统的方法,拓宽了涡轮效率特性测量的范围。试验台因为去掉了体积较大的冷却器和整套循环水路而变得更加简单紧凑,试验的操作也更加的方便,为涡轮的设计、生产和增压器与发动机的匹配提供了一种有效的试验手段。在一维仿真计算的基础上,分析了辅助增压器选配的原则,提出了一种辅助增压器的选配方案,这种新方案可使被测涡轮工作在高转速大负荷工况时,辅助增压器耗功水平提高60%。更多还原

【Abstract】 Based on the analysis of the efficiency measurement methods of the traditional turbocharger turbine,a new approach is proposed,which uses an "auxiliary" turbocharger instead of the traditional cooler to achieve the self-cyclic loading.The feasibility of this method is verified by both 1D simulation and experiment.The results show that with the new approach,the measurable turbine efficiency characteristic is extended.The measurement rig is simpler and compact and testing operation becomes convenient.This will be beneficial for turbine design,production as well as matching between turbocharger and ICE.Using 1D simulation,the principle of "auxiliary" turbocharger selection is analyzed and a new auxiliary turbocharger is proposed.The simulation results show that the dissipation power by this new auxiliary turbocharger increases by 60% compared with the original ones.更多还原