空气动力学学报Issue(6)：780-786,7.DOI:10.7638/kqdlxxb-2014.0039
三分支管接头可压缩流压力损失的试验研究
Experimental investigation on pressure loss of compressible combining flow at 45°T-junctions
汪文辉 1陆振华 1邓康耀 1刘胜2
作者信息
- 1. 上海交通大学 动力机械及工程教育部重点试验室，上海 200240
- 2. 中国北方发动机研究所，山西 大同 037036
- 折叠
摘要
Abstract
The inner flow in a 45°sharp-edged T-junction is measured on the pressure loss of the exhaust system.Pressure loss of compressible combining flow at two junctions is obtained at different flow conditions.Junctions are manufactured with area ratios ofφ=1 and 1.56 respec-tively.In addition,the axes in all branches are coplanar and the corners at the point of intersec-tions between lateral branch and main branch are sharp edged.Comparative analysis the data of pressure loss,the results indicate that pressure loss is mainly dependent of “junction loss”in the junction flow.The static pressure in the common branch is always lower than that of the inflow across the entire range of the mass flow rate ratio.Additionally,with increasing M3 ,the com-pressibility of the fluid significantly increases.The static pressure in the inflow branches 1 and 2 are equal in the present study.Flow parameters have been related to the Mach number in com-mon branch and the mass flow rate ratio between branch and duct.As the mass flow rate ratio of branch and duct increased,the total pressure loss coefficient K 13 and K 23 increased first and then decreased,while the peaks are different.The variation in the total pressure loss coefficient with Mach number in common branch is fairly small in the range of 0.13 to 0.31.However,along with the Mach number M3 increases to 0.59,the coefficient increases more rapidly.The results provide reference for the research of pressure loss and the boundary condition in one-dimensional junction compressible models.关键词
分支接头/流动参数/流量比/马赫数/压力损失系数Key words
junction/flow parameters/mass flow rate ratio/Mach number/pressure loss co-efficient分类
能源科技引用本文复制引用
汪文辉,陆振华,邓康耀,刘胜..三分支管接头可压缩流压力损失的试验研究[J].空气动力学学报,2015,(6):780-786,7.
