摘要
为对比不同形状接受孔的预旋系统内气流流动特性,通过数值模拟方法,对带有不同形状接受孔的预旋系统进行了研究。研究发现:收缩型接受孔入口截面气流流通面积较大,相对速度较小,在预旋系统中的性能最优,其次是类梯型,最后是直孔型。同一旋转雷诺数下,带收缩型接受孔的预旋系统无量纲温降较直孔型提高5.8%,总压损失系数降低3.0%。三种类型接受孔的预旋系统无量纲温降和总压损失系数均随进出口压比的增加而增大,在相同压比下,收缩型接受孔预旋系统无量纲温降最大,总压损失系数最小。
In order to compare the airflow characteristics with different shape receiver holes,the pre-swirl system was studied by numerical simulation method.The results show that the inlet cross-section of the shrinkage receiver holes has a larger airflow area and a smaller airflow relative velocity,it is optimal in pre-swirl systems,followed by ladder-like,and the final is the straight hole type.With the same rotating Reynolds number,compared to the straight receiver holes,the dimensionless temperature drop of the shrinkage receiver holes increased by 5.8%.Simultaneously,the total pressure loss coefficient of the shrinkage receiver holes is reduced by 3.0%.For the three types of receiver holes,the dimensionless temperature drop and total pressure loss coefficient increase with the increase of the inlet and outlet pressure ratio.With the same pressure ratio,the shrinkage receiver holes has the largest dimensionless temperature drop and the lowest total pressure loss coefficient.
作者
郑笑天
王锁芳
韦光礼
ZHENG Xiao-tian;WANG Suo-fang;WEI Guang-li(Key Laboratory of Aero-Engine Thermal Environment and Structure,Ministry of Industry and Information Technology,College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2020年第10期2222-2227,共6页
Journal of Propulsion Technology
基金
国家科技重大专项(2017-Ⅲ-0011-0037)。
关键词
接受孔
预旋系统
温降特性
总压损失
设计
Receiver holes
Pre-swirl system
Temperature drop characteristics
Total pressure loss
Design
