摘要
新型双面复合叶轮中,后进气通道与前进气通道完全不同,其流场结构更为复杂,阐明其对双面复合叶轮流场特性的影响具有重要意义。微型双面复合叶轮发动机后进气管通常有直管型、椭圆型和对称翼型三种类型,采用数值模拟方法分析不同后进气系统对双面复合叶轮压缩特性和流场结构的影响。结果表明:相比于直管型后进气管,椭圆型后进气管和对称翼型后进气管在压缩性能上略差,在流量范围上无明显差异;径向进气方式中椭圆型后进气道方案较佳,可匹配满足双面复合叶轮压缩特性和尾喷管稳定排气的需求;由副叶轮叶根轴向速度下降所引起的压力梯度增大,进一步诱导的分离涡是影响双面复合叶轮性能的主要原因之一。
In view of the complex flow field structure of the rear intake system,it is necessary to clarify its influence on the double-sided composite impeller,so as to provide reference for the structural design of the rear intake system.The rear intake pipe of micro double-sided composite impeller engine usually has three types:straight type rear intake pipe,elliptic type rear intake pipe and symmetrical airfoil type rear intake pipe.Numerical simulation is used to analyze the influence of different rear inlet systems on the compression characteristics and flow field structure of double-sided composite impeller.The results show that compared with the straight type rear intake pipe,the elliptic type rear intake pipe and the symmetrical airfoil type rear intake pipe are slightly worse in compression performance,but there is no significant difference in flow range.At the same time,the radial inlet with elliptical rear inlet is better,which can match the compression characteristics of double-sided composite impeller and meet the needs of stable exhaust of tail nozzle.As the axial velocity at the blade root of the auxiliary impeller decreases,the pressure gradient increases and the separation vortex is generated,which affects the performance of the doublesided composite impeller.This paper extends the understanding of the influence mechanism of the rear intake system with radial intake on the double-sided composite impeller.
作者
罗炳亮
杨蓓
王云
张呈
LUO Bingliang;YANG Bei;WANG Yun;ZHANG Cheng(School of Aircraft Engineering,Nanchang Hangkong University,Nanchang 330063,China;School of Aeronautical Engineering,Taizhou University,Taizhou 318000,China)
出处
《航空工程进展》
CSCD
2022年第5期131-140,共10页
Advances in Aeronautical Science and Engineering
基金
江西省研究生创新专项资金项目(YC2019-S342)。
关键词
后进气管
双面复合叶轮
副叶轮
边界涡量动力学
进气畸变
rear intake pipe
double-sided composite impeller
auxiliary impellers
boundary vorticity dynamics
inlet distortion
