发动机进气歧管出口流场的PIV试验研究  

Experimental Study of the Air Flow Field at the Vicinity of Intake Manifold

作　　者：游维华 高志胜[2] 伍涛[2] 何志霞[2] 

机构地区：[1]江苏江淮动力有限公司,江苏盐城224001 [2]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《内燃机》2015年第1期50-53,共4页Internal Combustion Engines

摘　　要：采用PIV技术针对L91型发动机进气歧管出口流场进行了试验研究,设定发动机模拟转速分别为2 500,3 000,3 500,4 000,4 500 r/min。试验结果表明,进气歧管出口空气流场可分为两个区域:离出口30 mm以内区域和离出口30mm以外区域;离出口30 mm以内区域,存在起伏波动的"流动边界层",发动机转速增加,空气流速越大,发动机转速由3 000 r/min增加至3 500 r/min时,流场中心速度增长程度最大;离出口30 mm以外区域的流线分布不均;离出口30 mm以内区域气流上下部存在大小相等,方向相反的瞬时涡量,离出口30 mm以外区域存在紧密靠近的涡流对。The PIV technology was used to investigate.the air flow field at the vicinity of the type of Lgl engine. The engine speed was set as 2 500, 3 000, 3 500, 4 000, 4 500 r/min respectively. The results indicated that the air flow field at the vicinity of the intake manifold can be divided into two areas, namely within the 30 mm outside the outlet and over 30 mm. The flow boundary layer existed within the 30 mm outside the outlet and the air flow velocity increased with the increasing engine speed. The air velocity along the center of the air flow increased mo~ rapidly when the engine speed increased from 3 000 r/min to 3 500 r/min. The streamline distributed uneven over 30 mm outside the outlet. The vorticities, having the same intensities and opposite rotating directions, existed along the upside and downside of the air flow. The vortex pair existed over 30 mm outside the outlet.

关 键 词：进气歧管 出口 空气流场 PW 

分 类 号：TK407[动力工程及工程热物理—动力机械及工程]