| 一种适用于柴油机结构温度场计算的缸内传热模型 |
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| 引用本文： | 刘晓日,李国祥,胡玉平,白书战,邓康耀.一种适用于柴油机结构温度场计算的缸内传热模型[J].上海交通大学学报,2014,48(9):1286-1290. |
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| 作者姓名： | 刘晓日 李国祥 胡玉平 白书战 邓康耀 |
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| 作者单位： | (1.山东大学 能源与动力工程学院， 济南 250061；2.上海交通大学 动力机械与工程教育部重点实验室， 上海 200240) |
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| 基金项目： | 国家高技术研究发展计划(863)项目(2012AA1117065);内燃机燃烧学国家重点实验室开放课题(K2013-1);国家自然科学基金项目(51306105)资助 |
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| 摘 要： | 基于量纲分析式h(Ф,i)=C(Ф)d-0.2 p0.8 w0.8 T-0.8μ-0.47eλ0.67ec0.33p分析了柴油机的缸内三维局部传热情况,其特征参数选取缸内瞬态流动传热参数,并通过Woschni模型计算传热总量,在每个曲轴转角条件下,保证局部传热计算中对全部壁面网格热流求和所得传热总量与Woschni模型的计算值相等,以确定待定系数C(Ф).同时,将改进的缸内传热模型应用于一款单缸水冷自然吸气式四冲程直喷柴油机的缸内传热计算,所得模拟结果与实验结果吻合.
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| 关 键 词： | 柴油机 缸内传热模型 总体传热 局部传热 特征参数 |
| 收稿时间： | 2013-12-25 |
An In-Cylinder Transient Heat Transfer Model for Temperature Field Simulation of Diesel Engine Structure |
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| LIU Xiao-ri;LI Guo-xiang;HU Yu-ping;BAI Shu-zhan;DENG Kang-yao.An In-Cylinder Transient Heat Transfer Model for Temperature Field Simulation of Diesel Engine Structure[J].Journal of Shanghai Jiaotong University,2014,48(9):1286-1290. |
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| Authors: | LIU Xiao-ri;LI Guo-xiang;HU Yu-ping;BAI Shu-zhan;DENG Kang-yao |
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| Institution: | (1. School of Energy and Power Engineering, Shandong University， Jinan 250061, China;2. Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai Jiaotong University, Shanghai 200240, China) |
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| Abstract: | Based on the dimensional formula h(,i)=C()d－0.2p0.8w0.8T－0.8μ－0.47eλ0.67ec0.33p, a local heat transfer model was developed and characteristic parameters were proposed as transient flow and heat transfer parameters. The total quantity of heat transfer was calculated using Woschni correlation. By ensuring that the total quantity of heat transfer from local heat transfer model is always equal to Woschni correlation at every crankangle, the undetermined coefficient C() was obtained. The improved model was applied to a single cylinder water cooled natural aspirated four stroke direct injection diesel engine. The simulation results are satisfactorily in agreement with the experiment.
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| Keywords: | diesel engine in-cylinder heat transfer model total heat transfer local heat transfer characteristic parameters |
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