刘晓日，黎明，郑清平，黎苏，李国祥.考虑沸腾和缸内局部传热的缸盖流固耦合传热分析[J].内燃机工程,2017,38(6):139-144.
考虑沸腾和缸内局部传热的缸盖流固耦合传热分析
Fluid Solid Interaction Heat Transfer Analysis of Cylinder Head in Consideration of Boiling and In Cylinder Local Heat Transfer
DOI：
关键词:柴油机  缸盖  缸内局部传热  沸腾传热  流固耦合
Key Words:diesel engine  cylinder head  in cylinder local heat transfer  boiling heat transfer  fluid structure interaction
基金项目:国家自然科学基金项目（51576116）；河北省教育厅科学研究计划青年基金项目(QN2016041)
作者单位
刘晓日，黎明，郑清平，黎苏，李国祥 1.河北工业大学 能源与环境工程学院，天津 300401；2.山东大学 能源与动力工程学院，济南 250061 
摘要点击次数: 2062
全文下载次数: 1617
摘要:以某商用车直列6缸柴油机作为研究对象，基于缸内传热模型获得内燃机缸盖和缸套的燃气侧局部传热边界条件；基于均相流沸腾传热模型获得水侧传热边界；实现水侧、燃气侧边界与结构温度场计算的耦合，并判断水腔内沸腾传热的状态。结果表明：缸盖温度计算值与实测值吻合，缸盖最高温度位于缸盖底面两个排气门之间；排气门之间的燃气传热系数和燃气温度均处于较高值，缸内局部传热显著；在缸盖底面中心和排气门附近水腔内的冷却水处于部分发展泡核沸腾状态。
Abstract:Based on the gas-side local heat transfer boundary conditions of cylinder head and cylinder liner obtained by the in-cylinder heat transfer model and the water-side heat transfer boundary conditions obtained by the homogeneous flow boiling heat transfer model, a heat transfer calculation of the structural temperature field coupled with the gas side and water side boundary conditions was carried out on an in line 6 cylinder diesel engine for commerical vehicles, and the state of boiling heat transfer in cylinder head water channel was evaluated. Results show that the simulation results of the cylinder head temperature are in good agreement with the measured values. The maximum cylinder head temperature is located at the bridge zone between two exhaust valves on the cylinder head fire deck. The gas heat transfer coefficient and gas temperature between the exhaust valves are at a high value, while the in cylinder local heat transfer is significant. The cooling water at the center of the cylinder head fire deck and in the water channel near the exhaust valve is in a state of partially developed nucleate boiling.
查看全文  HTML   查看/发表评论