带盖板预旋系统流动与温降特性的数值模拟  

Numerical Simulation of Flow Characteristics and Temperature Drop in Cover-Plate Pre-Swirl System

作　　者：彭鸿博[1] 刘志宏 刘聪 张宗卫[1] PENG Hong-bo;LIU Zhi-hong;LIU Cong;ZHANG Zong-wei(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300

出　　处：《科学技术与工程》2020年第35期14723-14729,共7页Science Technology and Engineering

基　　金：上海航天科技创新基金(SAST2018-017)。

摘　　要：为了研究带盖板预旋系统的流动与温降特性,对不同喷嘴角度和不同转速(工况)下的预旋结构模型进行数值模拟。在相同进气条件下,研究有无预旋结构和不同喷嘴角度下的盘腔流动与温降特性,分析旋转雷诺数对系统流动情况和温降效果的影响。结果表明:预旋结构在盖板腔内产生的漩涡增强了盘腔的流动,相比于无预旋结构,预旋系统的盖板腔压力和系统出口总温明显降低;随着喷嘴角度的增大,盘腔总温和静压均增大,温降效果变差;随着旋转雷诺数的增大,系统无量纲质量流量增大,无量纲温降和总压损失系数均减小;预旋角由50°减少到30°时,系统无量纲温降增加了23.7%。To investigate the flow characteristics and temperature reduction in cover-plate pre-swirl system,a numerical simulation of a model at different nozzle angles and different rotational speeds of pre-swirl structure was performed.Under the same intake conditions,the flow and temperature drop characteristics of the disk cavity with or without pre-swirl system at different pre-swirl nozzle angles were studied,and the effect of rotational Reynolds number on the flow and temperature drop was analyzed..Results show that the vortex generated by pre-swirl structure in the cover cavity enhanced the flow of the disk cavity.Compared with the non-pre-swirl structure,the cover cavity pressure and the total outlet temperature were significantly reduced.As the nozzle angles increased,the total temperature and static pressure of the disk cavity increased,and the cooling effect became poorer.In addition,with the increase of the rotational Reynolds number,the dimensionless mass flow rate increased,and the dimensionless temperature drop and total pressure loss coefficient decreased.When pre-swirl angle was reduced from 50°to 30°,the dimensionless temperature drop increased by 23.7%.

关 键 词：预旋系统 流动特性 喷嘴角度 温降 数值模拟 

分 类 号：V231.16[航空宇航科学与技术—航空宇航推进理论与工程]