鼻梁区水腔结构对缸盖底板传热影响研究  

Study on the Effects of the Water Jacket Configurations of Bridge Zone on the Heat Transfer for Cylinder Head Bottom Deck

作　　者：刘震涛[1] 尹旭[1] 孙正[1] 黄瑞[1] 韩松[1] 俞小莉[1] 

机构地区：[1]浙江大学动力机械及车辆工程研究所,杭州310027

出　　处：《内燃机工程》2016年第1期103-108,115,共7页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51206141)

摘　　要：建立了参数化的缸盖底板及水腔简化模型,并用六缸机整机计算结果及缸盖测温试验验证模型有效性。随后进行了鼻梁区水腔结构因素对缸盖底板温度、轴向温度梯度、第三主应力的影响规律研究。计算结果表明:截面长度和宽度在不同鼻梁区域有不同的影响规律,在同一区域,截面的长、宽、高因素对温度场、应力场的影响同样存在差异。对于鼻梁区中点温度和轴向温度梯度,截面高度为影响最大的因素,其次是截面宽度和长度;对于第三主应力,截面高度同样影响最大,其次是截面长度和宽度。排气门鼻梁区温度较高,可以通过降低截面高度、长度和增加截面宽度实现;进气门鼻梁区热应力较高,可以通过增加截面高度、降低截面长度和宽度实现。A simplified parameterized model was established for cylinder head bottom deck with water jacket, which was validated by the simulation result of a six-cylinder engine model and the cylinder head temperature test data. The effects of water jacket configurations of cylinder head bottom deck on the bridge zone temperature, axial temperature gradient and minor principal stress were investigated. The calculation results show that, section length and width have different influences at different bridge zone. In the same zone, there are also different effects of section length, width and height on the bridge zone temperature and axial temperature gradient. Section height is the main influence factor on the midpoint temperature and axial temperature gradient in the bridge zone, followed by the section length and width. For the minor principal stress, the main influence factor is also the section height, followed by the section length and width. The high temperature exhaust bridge zone can be reduced by reducing section height and length and by increasing section width, while the high thermal stress in the intake bridge zone can be improved by reducing section height, length and width.

关 键 词：内燃机 简化模型 鼻梁区 流固耦合 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]