Numerical Modelling of a Supersonic Axial Turbine Stator  

作　　者：Aki Grnman Teemu Turunen-Saaresti Ahti Jaatinen Jari Backman 

机构地区：[1]LUT Energy,Lappeenranta University of Technology,P.O.Box 20,FI-53851 Lappeenranta,Finland

出　　处：《Journal of Thermal Science》2010年第3期211-217,共7页热科学学报（英文版）

基　　金：supported by the Academy of Finland,The Finnish Graduate School in Computational Fluid Dynamics and the Henry Ford Foundation

摘　　要：In order to improve the turbocharging process,a supersonic axial turbine stator was modelled numerically with a pulsatile inlet mass flow.The main objectives of the study were to find out how pulsation affects the flow field and the performance of the stator.At the beginning of the study,a supersonic turbine stator was modelled using three different techniques:quasi-steady,time-accurate with constant boundary conditions and time-accurate with a pulsatile inlet mass flow.The time-averaged and quasi-steady flow fields and performance were compared,and the flow field and stator performance with a pulsatile inlet mass flow was studied in detail at different time-steps.A hysteresis-like behaviour was captured when the total-to-static pressure ratio and efficiency were plotted as a function of the inlet mass flow over one pulse period.The total-to-static pressure ratio and efficiency followed the sinusoidal shape of the inlet flow as a function of time.It was also concluded that the stator efficiency decreases downstream from the stator trailing edge and the amplitude of the pulsating mass flow is decreased at the stator throat.

关 键 词：CFD SUPERSONIC TURBINE STATOR TURBOCHARGING 

分 类 号：TK730.3[交通运输工程—轮机工程]