05 - Propulsion
A MOMENTUM-INTEGRAL METHOD TO CALCULATE WINDAGE LOSSES ON A ROTATING DRUM WITH SUPERPOSED FLOW
H. Tuo¹, P. Liu¹, S. Ding¹, T. Qiu¹, C. Liu¹, R. Cheng, AECC Shenyang Engine Research Institute, China; ¹Research Institute of Aero-Engine, Beihang University, China
In order to evaluate the windage losses of the rotating drum in aero-engines, a Von Karman-type momentum-integral method is presented. A 1/7th power law for the velocity profile is assumed. Comparison results showed that the moment coefficient’s discrepancy between the theoretical solution and the CFD method is less than 10% for Rossby numbers ranging from 0.1 to 1.