摘要
对带盖盘45°预旋系统的预旋腔和转静腔内流动特性进行了实验研究,得到了高转速下静盘表面的静压分布、中心面(z/S=0.326)总压分布、流阻系数以及预旋孔排气系数的变化规律。结果表明:流量分配对腔内压力分布影响较小;湍流参数是腔内流动特性的主要影响参数之一;腔内流动结构主要分为转静腔的自由涡结构以及预旋腔的回流区和低压区;流阻系数随湍流参数变大而显著上升;预旋孔排气系数随着进、出口压比增加而增加。
Flow characteristics of pre-swirl cavity and rotor-stator cavity of a cover-plate 45° pre-swirl system structure were studied experimentally. Static pressure distribution on the stator, total pressure distribution on the mid plane （z/S=0. 326） and variations of the flow resistance coefficient in cavity and pre-nozzle discharge coefficient were obtained under high rotation speed. The results show that the pressure distribution in cavity is affected by the flow distribution weakly. The turbulent flow parameter is one of the primary control pa- rameters of flow characteristics. The flow structure in cavity is mainly divided into two parts, the free vortex structures of rotor-stator cavity, and the recirculation and low pressure zones in pre-swirl cavity. The flow resistance coefficient of the cavity rise significantly with the increase of the turbulent flow parameter. The discharge coefficient of pre-swirl nozzle in- creases with the increasing pressure ratio of pre-swirl nozzle.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2017年第9期2125-2131,共7页
Journal of Aerospace Power
关键词
盖盘
预旋
转静系
预旋腔
流动
cover-plate
pre-swirl
rotor-stator system
pre-swirl cavity
flow
