Numerical analysis on system performance of a pre-swirl air supply system about the improvement of receiver hole structure

Abstract

As an important component for a pre-swirl air supply system, the performance of the receiver hole directly affects the quality of cooling air supplied to turbine rotor blades of an aeroengine. For a high-radius pre-swirl system with a difference in radius between the pre-swirl nozzle and the supply hole, numerical research and experimental verify were done to research the design problem of the receiver hole for the system. The results of numerical study show that the runway shaped receiver hole and the drilling shaped receiver hole have little difference for the system performance, and the vane shaped receiver hole has the best system performance. The increase of the length-to-diameter ratio slightly improved the system performance. Meanwhile, the circumferential angle of the receiver hole can significantly reduce the system dimensionless specific power consumption of the pre-swirl air supply system. Compared with the system using the runway shaped receiver hole, the system temperature drop efficiency of the system using the vane shaped receiver hole can increase by 14.6% under the design condition, up to 0.63. And the system dimensionless specific power consumption of it can decrease by 44.6%.