实验流体力学Issue(4)：43-48,6.DOI:10.11729/syltlx20130049
排气管系三分支接头内部流场的 PIV 测试研究
PIV measurement of inner flow field in exhaust manifold junction
汪文辉 1陆振华 1刘胜 2邓康耀 1崔毅1
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 field in the 45°sharp-edged T type junction of the axial section was measured on the pressure loss of the exhaust system by Particle Image Velocimetry (PIV).Char-acteristics of flow type 6 were obtained at different mass flow rate ratios and Mach numbera.The pipe area in each branch of the tested 45°junction remained constant,D =50mm.The axes in all branches were coplanar and the corners at the point of intersections between lateral branch and main branch were sharp edged.The experimental data were measured for the junction with vari-ous mass flow rate ratios (q =0,0.25,0.5,0.75 and 1)and Mach number in common branch (Ma=0.13,0.31 and 0.59).Comparatively analysed the data of the velocity field and streamline pattern.Conclusion were drawn out that flow contraction occurred in downstream of the junc-tion.The feature of the flow field was related to the Mach number in common branch and the mass flow rate ratio between branch and duct in type 6.As the mass flow rate ratio of branch and duct increased,the turbulent region was enhanced and pressure loss enlarged.Mach number would also change the flow characteristics and pressure loss.The variation in the total pressure loss coefficient with Ma was fairly small in the range of 0.13 up to 0.31.However,along with the Mach number increased to 0.59,the coefficient increased more rapidly.关键词
分支管接头/粒子图像测速/流场/流量比/马赫数Key words
junction/Particle Image Velocimetry (PIV)/flow field/mass flow rate ratio/Mach number分类
能源科技引用本文复制引用
汪文辉,陆振华,刘胜,邓康耀,崔毅..排气管系三分支接头内部流场的 PIV 测试研究[J].实验流体力学,2014,(4):43-48,6.
