Experimental Analysis of Tubed Vortex Reducers in a Rotating Cavity with Radial Inflow

The cooling air provided by the secondary air system is used for cooling and sealing the hot end components of the aero-engine. Vortex reducer is set to reduce the pressure loss of the bleed air section. Experimental research was performed to determine the pressure drop of tubed vortex reducer in a rotating cavity with radial inflow. The experiment revealed that the performance of a vortex reducer is determined by geometry length, the rotational Reynolds number and the mass-flow coefficient. Within the condition scope of the present study, the pressure loss increases as the increase of tube length. According to the experimental data, fitting curves of the pressure loss coefficient, which related with Rossby number, is given. It can provide the reference for the design of the tubed vortex reducer.