第32卷第7期上海交通大学学报Vol.32No.71998年7月JOURNALOFSHANGHAIJIAOTONGUNIVERSITYJul.1998冰箱中空气流场和温度场的有限元模拟*丁国良L.R.Oellrich(上海交通大学制冷与低温工程系)(德国Karlsruhe大学)摘要使用有限元程序FIDAP7.6,在Karlsruhe大学的IBM/6000SP并行计算机上,对冰箱内部的二维稳态空气流场进行了模拟,研究了热负荷、冰箱内部搁板与蒸发器及门之间的间距、内部搁板的导热系数对箱内温度分布与流场的影响.实验结果表明,二维稳态模型能够反映不同参数对冰箱内部温度场与流场的影响.关键词冰箱;流场;温度场;有限元;模拟中图法分类号TB611SimulationofAirFlowandTemperatureFieldinsideaRefrigeratedChamberwithFiniteElementMethodDingGuoliangDepartmentofRefrigerationandCryogenicsEngineering,ShanghaiJiaotongUniversity,ChinaL.R.OellrichKarlsruheUniversity,GermanyAbstractInordertoknowtheinfluencesofdifferenceparametersontheairflowandtemperaturefieldinarefrigeratorandtooptimizethefield,twodimensionalstaticairflowandtemperaturedistri-butionaresimulatedwiththefiniteelementsoftwareFIDAP7.6runontheparallelcomputerIBM/6000SPofKarlsruheUniversity.Theinfluencesofheatloads,thedistancesbetweenthefittingsandtheevaporatorandthedoor,respectively,aswellastheheatconductivityofthefittingsonthetem-peraturefieldandtheairflowfieldareinvestigated.Thereliabilityofthetheoreticalmodelisprovedbytheexperiments.Itisshownthatthetwodimensionalstaticmodelcanreflecttheinfluencesofmanydifferentparametersonthetemperaturefieldandbythatalsotheairflowfield.Whentheheatloadincreases,thethicknessoftheboundarylayerwilldecreaseandthetemperaturedifferencesalongtheheightwillincrease.Whenthedistancesbetweenthefittingsandtheevaporatorandthedoorre-spectivelyincrease,theairconvectionwillbestrengthenedandthetemperaturedifferencesbetweendifferentpartsinsidetherefrigeratorwillalsoincrease.Theheatconductivityofthefittingshaslittleinfluenceonthetemperaturefieldandtheairflowfieldundernormalworkingconditionsoftherefrig-erator.Keywordsrefrigerator;flowfields;temperaturefield;finiteelements;simulation冰箱中的食物保存质量直接依赖于箱内的空气流场和温度分布,型式试验时的冰箱耗电量也同箱内温度场密切相关,所以温度场与流场的优化是冰箱设计中的重要问题.但是流场的优化既不能靠较简收稿日期:1997-09-29*德国利勃海尔(LIEBHERR)家用电器公司资助项目丁国良:男,1966年生,副教授(博士).邮编:200030第7期丁国良,等:冰箱中空气流场和温度场的有限元模拟19单的代数方程来进行,也不能完全