双对置二冲程柴油机扫气过程的进气口结构影响规律  

Influence of Intake Port Structure on Opposed Piston Opposed Cylinder Two-Stroke Diesel Engine Scavenging Process

作　　者：邹玉红[1,2] 卢勇[1,2] 裴普成[1,2] 李鹏程[1,2] 徐广辉[3] 郝勇刚[3] 刘长振[3] 

机构地区：[1]清华大学汽车工程系,北京100084 [2]清华大学汽车安全与节能国家重点实验室,北京100084 [3]中国北方发动机研究所,天津300000

出　　处：《西安交通大学学报》2016年第1期47-52,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(51176082)

摘　　要：针对对置活塞、对置汽缸(OPOC)柴油机的结构特点,基于ANSYS Fluent软件对一款典型的OPOC柴油机扫气过程建立了三维仿真模型,模型主要涉及柴油机进气道和进气口部分、排气道和排气口部分以及内、外活塞之间的气缸部分,由此研究了进气口结构对双对置内燃机扫气过程的影响规律。研究结果表明:当涡流排高度比从0.37增大到0.63时,进气口面积随之减小,进气量减少,扫气效率下降;当涡流排高度比为0.5时,涡流排径向倾角由8°增大到40°,缸内涡流比和实际进气量均随之增大,涡流排倾角为34°时缸内涡流比和实际进气量达到最大且扫气过程最为理想。该结果可为二冲程柴油机的动力性、经济性和排放性研究提供参考。Allowing for the unique structure of opposed piston opposed cylinder（OPOC）diesel engine,a 3Dsimulation model of a typical OPOC diesel engine was established with ANSYS Fluent software to investigate the influence of intake port structure on the scavenging process.The simulation model mainly includes intake and exhaust ports,inlet,outlet,and cylinder between the opposed pistons.The simulation shows that with the increase of port height-ratio of swirl row from 0.37 to 0.63,the area of intake port decreases leading to reduced intake air.As a result,the scavenging efficiency decreases.When the port height-ratio of swirl row reaches 0.5,swirl ratio and actual air input of cylinder increases with the port tangential angle of swirl row raising from 8°to 40°and achieve the maximum at 34°tangential angle,which is an ideal scavenging process for this OPOC engine.This result provides a reference for the further research on power performance,fuel economy,and exhaust for the OPOC diesel engine.

关 键 词：对置活塞对置汽缸 扫气过程 进气口结构 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程]