脉冲全周进气和非全周进气涡轮性能比较的数值研究

摘要

分别设计了全周进气双流道涡轮和非全周进气双流道涡轮,通过数值模拟,对两种结构进行了全工况性能分析.结果表明,非全周进气双流道涡轮的效率高于全周进气双流道涡轮.通过流场分析揭示了涡轮内部流动损失机理,从而了解两种结构对涡轮效率和输出功率的影响,为涡轮增压器的进一步开发提供一定的理论依据.%Circumferential dual-channel intake turbine and non-circumferential dual-channel intake turbine were designed respectively. By the numerical simulation, the turbine performance of two structures were analyzed in all operating conditions. The simulation results showed that the efficiency of non-circumferential dual-channel intake turbine was higher than that of circumferential dual-channel intake turbine. With the analysis of flow field, the mechanism of internal flow loss was indicated and the influence of two structures on turbine efficiency and output power were realized, which provided the theoretical reference for further development of turbocharger