For a variable geometry turbocharger with partial admission, the low-speed performance and internal flow of turbine with different circumferential inlet angles were analyzed by the numerical simulation, the operating characteristics and the mechanism of internal flow loss were mastered, and the influence degree of circumferential inlet angle on turbine efficiency and flow was determined, which provided the reference for matching turbocharger with different engines.%针对一种新型的部分进气可变截面涡轮增压器,采用数值研究方法对不同周向进气角涡轮的低速工况性能及内部流场进行了分析研究,掌握了部分进气涡轮的工作特性和内部流动损失机理,明确了周向进气角对涡轮效率和流量的影响程度,为实现增压器与不同类型发动机的匹配提供了依据.
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