多缸柴油机冷却系统流动不均匀性的仿真研究
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- 英文论文题名：Simulation Study on Fluid Non-Uniformity of Multi-Cylinder Diesel Engine Cooling System
- 论文作者：杜巍 ; 包文华 ; 刘福水
- 英文论文作者：Du Wei ; Bao Wenhua ; Liu Fushui ; Beijing Institute of Technology
- 年：2016
- 作者机构：北京理工大学机械与车辆学院;
- 论文关键词：多缸柴油机 ; 冷却水腔 ; 流动不均匀性
- 英文论文关键词：multi-cylinder diesel engine ; cooling water system ; flow non-uniformity
- 会议召开时间：2016-10-26
- 会议录名称：2016中国汽车工程学会年会论文集
- 英文会议录名称：Proceedings of 2016 SAE-China Congress
- 语种：中文
- 分类号：U464.172
- 学会代码：QCGC
- 会议名称：2016中国汽车工程学会年会暨展览会
- 会议地点：中国上海
- 主办单位：中国汽车工程学会
- 学会名称：中国汽车工程学会
- 页数：4
- 文件大小：754k
- 原文格式：O
- 会议级别：全国
摘要
本文以多缸柴油机的冷却水腔为研究对象,使用Fluent软件对直列6缸柴油机冷却系统的流场进行仿真,主要研究了柴油机各缸水套和缸盖内部水腔压力和流场的分布规律,以及冷却液入口总流量不同时各缸流动不均匀度的情况。结果表明:当入口流量一定时,从第1缸至第6缸,各缸水套压力逐渐降低,各缸缸盖的压力则逐渐升高,各缸缸盖进、出口压差逐渐降低,且各缸盖的流量也逐渐降低;当冷却液入口流量逐渐降低时,整个水腔进、出口的总压降随之降低,各缸盖中的最大流量与最小流量的差值逐渐减小,但各缸缸盖的流量不均匀度变化不大,只是在一个较小的范围内上下浮动。
The cooling system of Multi- cylinder diesel engine was discussed in this paper by using Fluent software for the flow field calculation of a 6 cylinder diesel engine.The principle of flow pressure and velocity distribution was also studied for each cylinder heads and each water jacket with different conditions.The results can be briefed as follows:with the inlet flow being fixed,the fluid pressure in water jacket gradually reduced from the first cylinder to the sixth cylinder while with the pressure in cylinder head increasing,the pressure difference between inlet and outlet of each cylinder head gradually reduced.When the flow rate of coolant inlet decreased,the pressure difference of the whole system also reduced and the difference between the maximum flow and minimum flow rate also reduced,but the flow non- uniformity of cylinder head varied in a little range.
The cooling system of Multi- cylinder diesel engine was discussed in this paper by using Fluent software for the flow field calculation of a 6 cylinder diesel engine.The principle of flow pressure and velocity distribution was also studied for each cylinder heads and each water jacket with different conditions.The results can be briefed as follows:with the inlet flow being fixed,the fluid pressure in water jacket gradually reduced from the first cylinder to the sixth cylinder while with the pressure in cylinder head increasing,the pressure difference between inlet and outlet of each cylinder head gradually reduced.When the flow rate of coolant inlet decreased,the pressure difference of the whole system also reduced and the difference between the maximum flow and minimum flow rate also reduced,but the flow non- uniformity of cylinder head varied in a little range.
引文
[1]王伟超.高压共轨柴油机工作不均匀性控制策略研究[D].昆明:昆明理工大学,2014.
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[3]杜巍,赵庆隆,刘福水.基于全缸缸压测量的柴油机机械效率[J].农业工程学报,2014,01:31-37.
[4]范磷.V型8缸柴油机冷却系统流动不均匀性研究[D].北京:北京理工大学,2015.
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[8]刘维.缸垫分水孔位置对发动机水套速度场和压力场分布影响研究[D].重庆:重庆大学,2013.
[9]Liu Chuanbo:Zhang Cheng.CFD Analysis of Engine Water Jacket and it's Optimization[C].ADVANCED DESIGN TECHNOLOGY,2011(308-310):2308-2312.
[10]Stefano Fontanesi,Matteo Giacopini.Multiphase CFD-CHT Optimization of the Cooling Jacket and FEM Analysis of the Engine Head of a V6 Diesel Engine[J].SAE pnper,2010-01-2096.
[2]杜巍,孙伟华,刘福水.增压多缸柴油机各缸进气不均匀性的研究[J].内燃机工程,2010,04:27-30.
[3]杜巍,赵庆隆,刘福水.基于全缸缸压测量的柴油机机械效率[J].农业工程学报,2014,01:31-37.
[4]范磷.V型8缸柴油机冷却系统流动不均匀性研究[D].北京:北京理工大学,2015.
[5]周龙保.内燃机学[M].北京:机械工业出版社,2010.
[6]李迎,俞小莉,陈红岩,等.发动机冷却系统流固耦合稳态传热三维数值仿真[J].内燃机学报,2007(03):252-257.
[7]张沛毅.基于流固耦合法的发动机冷却均匀性研究[D].昆明:昆明理工大学,2012.
[8]刘维.缸垫分水孔位置对发动机水套速度场和压力场分布影响研究[D].重庆:重庆大学,2013.
[9]Liu Chuanbo:Zhang Cheng.CFD Analysis of Engine Water Jacket and it's Optimization[C].ADVANCED DESIGN TECHNOLOGY,2011(308-310):2308-2312.
[10]Stefano Fontanesi,Matteo Giacopini.Multiphase CFD-CHT Optimization of the Cooling Jacket and FEM Analysis of the Engine Head of a V6 Diesel Engine[J].SAE pnper,2010-01-2096.