ASME大涡模拟计算离心压气机流场.pdf

Proceedings of ASME Turbo Expo 2011 GT2011 June 6-10, 2011, Vancouver, British Columbia, Canada GT2011-45804 TOWARDS LARGE-EDDY SIMULATION OF TURBULENT FLOW IN A CENTRIFUGAL IMPELLER Gorazd Medic Jinzhang Feng United Technologies Research Center United Technologies Research Center 411 Silver Lane, East Hartford, CT 06108, USA 411 Silver Lane, East Hartford, CT 06108, USA Liwei Chen Om Sharma United Technologies Research Center (China) Ltd. United Technologies Research Center Room 3512, 35/F, Shanghai World Financial Center, 100 411 Silver Lane, East Hartford, CT 06108, USA Century Avenue, Pudong, Shanghai, 200120, P.R.China ABSTRACT D hydraulic diameter Large-eddy simulation (LES) using wall-adapting local x x-coordinate of the center of the bend (for curved duct) eddy-viscosity (WALE) subgrid scale model has been applied c towards elucidating the complex turbulent flow physics in a yc y-coordinate of the center of the bend centrifugal impeller. Several canonical cases of increased z z-coordinate of the center of the bend complexity were analyzed to better under