带盖盘45°预旋系统流动特性的实验  

Experiment of flow characteristics of cover-plate 45° pre-swirl system

作　　者：孙占东[1] 罗翔[1,2] 黄由之[1] 周志翔 廖乃兵 

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室,北京100191 [3]中国航空发动机集团有限公司湖南动力机械研究所,湖南株洲412002

出　　处：《航空动力学报》2017年第9期2125-2131,共7页Journal of Aerospace Power

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.

关 键 词：盖盘 预旋 转静系 预旋腔 流动 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]