基于沸腾传热模型的缸盖水腔设计判据  

Design Criterion for Cylinder Head Water-Jacket Based on Boiling Heat Transfer Model

作　　者：刘晓日[1,2] 李国祥[1] 胡玉平[1] 傅松[1] 邓康耀[2] 

机构地区：[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

出　　处：《内燃机工程》2014年第4期73-78,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家“八六三”高技术研究发展计划项目(2012AA1117065)

摘　　要：根据缸盖水腔内可能存在的传热状态及特点定义了强制对流区、部分发展泡核沸腾区、充分发展泡核沸腾区、临界裕量区和过渡及膜态沸腾区五种区域。基于对传热模型带来的误差和水腔设计安全裕度两方面的考虑,提出了缸盖水腔设计的临界极限判定方法。开发了缸盖水腔传热设计判据的软件模块,应用于两款发动机缸盖水腔的设计计算分析,重型商用车柴油机缸盖火力面温度计算值与测试值的最大误差为3.19%,平均误差为1.42%,表明新方法能够较准确地评价缸盖内的传热实际情况。紧凑型柴油机缸盖水腔设计中的应用说明新方法便于用来评判和指导缸盖水腔设计方案的改进。Five kinds of zones were defined by possibly existing heat transfer conditions and their characteristics： forced convection（FC） zone, partially developed nucleate boiling （PDNB） zone, fully developed nucleate boiling （FDNB） zone, zone of safety allowance for CHF （SAC）, transition and film boiling （TFB） zone. In consideration of model error and wateracket heat transfer safety allowance, the design criterion for cylinder head water-jacket was proposed. Software module of heat transfer criterion in cylinder head waterjacket was developed and applied practical head water-jacket calculation of two kinds of engines. In a heavy duty commercial vehicle diesel engine, max. error between calculated and test results for the firedeck is 3.19% and average error is 1.42%. It is demonstrated that this method can accurately reflect the actual head heat transfer situation. Application example in a compact diesel engine shows also that it is convenient to assess and improve head water-jacket design.

关 键 词：内燃机 缸盖 水腔 沸腾传热 判据 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]