Investigation Of Effects Of The Characteristic Parameters On The Rotor-stator Cavity System With Pre-swirl Flow

The using of pre-swirl cooling method could increase the efficiency of the cooling air to the turbine blades which swirl in the rotation direction of the turbine, and it can guarantee the safe and reliable performance of aero-engine and prolong its working time.The investgations of the regular pre-swirl rotor-stator cavity is limited due to the complicated structure of the real turbine disk. So it is necessary to do the research on the complicated pre-swirl rotor-stator cavity.In this paper, numerical simulations were conducted to investigate the effects of the different characteristic parameters of the complicated pre-swirl rotor-stator cavity with three outflows by the use of FLUENT software according to the background and the actuality of the pre-swirl cooling. And it is got the conclusion that the influence of the characteristic parameters to the flux proportion,total temperature drop and total pressure coefficient. An experimental system was outlined in order to do experiments later .Numercial results indicate that: 1) the flux proportion is influenced little by the gap between the rotor and the stator; 2) the flux proportion is influenced little by the pre-swirl angles; 3) the flux proportion is influenced evident by the rotational Reynolds number; 4) the flux proportion is influenced distinct by the geometry size; 5) the nondimensional total temperature difference and the total pressure coefficient are monotone decreased with the increase of rotational Reynolds number; 6) the nondimensional total temperature difference and the total pressure coefficient increase with the increase of the inlet total temperature; 7) the nondimensional total temperature difference decrease while the total pressure coefficient increase because of increasing the pre-swirl inflow; 8) the nondimensional total temperature difference and the total pressure coefficient decrease and then go up with the gap between the rotor and the stator increases; 9) the nondimensional total temperature difference increases while the total pressure coefficient decreases with the decrease of pre-swirl angles.The present study will theoretically provide a direction for the design of complicated rotor-stator cavity with pre-swirl flow.