柴油机两级涡轮增压系统不稳定流动模拟计算的研究

Simulation Calculation to Unsteady Flow of Two-class Turbocharged Systems in Diesel Engines

对柴油机两级涡轮增压系统不稳定流动过程,采用一维不稳定流动的特征线方法进行模拟计算,主要对串联涡轮所遇到的压气机变入口压力边界条件和串联压气机所遇到的压气机变入口压力边界条件的确定进行了讨论;并完成了柴油机两级涡轮增压不稳定流动过程模拟计算程序的编制,实现了对过程的模拟计算。

One-dimensional unsteady flow characteristic line method is adopted to simulate and calculate the unsteady flow process of two-class turbocharged systems in diesel engines.This paper discusses the determination of boundary conditions of variable outlet pressure that turbines connected in series meet and boundary conditions of variable inlet pressure that compressors connected in series meet.The compiling of simulation calculation program for unsteady flow process of two-class turbocharged systems in diesel engines is completed in this paper.The simulation calculation of the process is realized.