脉冲进气对径流涡轮转子通道内部流场影响研究

摘要

The inlet pressure and temperature experienced by vehicle turbocharger turbines are pulsative .Accordingly this pa-per aims at solving 3D unsteady N -S equation groups under pulsating flow condition ,the flow field of radial turbine rotor passa-ges with identical stage inlet condition was analyzed .The result show that, the turbine performance under pulsating inlet flow con -titon is of highly unsteady features .%　　基于车用增压器涡轮的进口压力和温度是脉动变化的，本文采用 Numeca 软件求解进口边界条件为给定脉动总压总温的三维非定常 Navier －Stokes 方程组，并对相同进口条件下的涡轮转子内部流场进行分析。研究结果表明，脉冲进气条件下的涡轮特性具有强烈的非定常特征。