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

doi:10.7652/xjtuxb201601008

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

更新时间：2025-07-09

- Influence of Intake Port Structure on Opposed Piston Opposed Cylinder Two-Stroke Diesel Engine Scavenging Process
- Vol. 50, Issue 1, Pages: 47-52(2016)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201601008
  CLC： TK411.2
- Online First：10 January 2016，
  
  Published：2016
- 稿件说明：
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Influence of Intake Port Structure on Opposed Piston Opposed Cylinder Two-Stroke Diesel Engine Scavenging Process[J]. 2016, 50(1): 47-52.
DOI：

Influence of Intake Port Structure on Opposed Piston Opposed Cylinder Two-Stroke Diesel Engine Scavenging Process[J]. 2016, 50(1): 47-52. DOI： 10.7652/xjtuxb201601008.

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。

Abstract

Allowing for the unique structure of opposed piston opposed cylinder(OPOC)diesel engine

a 3D simulation 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

Keywords

references

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