第45卷(2023)第3期Vol.45(2023)No.3柴油机DieselEngineDOI:10.12374/j.issn.1001-4357.2023.03.001高压液氨喷雾燃烧的数值模拟和试验验证王宁1,李铁1,2,周昕毅1,2,陈润1,2,李世琰1,2,依平1,2(1.上海交通大学海洋工程国家重点实验室,上海200240;2.上海交通大学动力装置及自动化研究所,上海200240)摘要:以液氨喷雾混合气形成和燃烧过程为对象进行数值模拟和试验验证。根据试验获得的气液相贯穿距数据对三维模型进行参数标定。结果表明:建立的喷雾模型可以在高温高压环境条件下准确预测液氨喷雾的贯穿发展过程;在喷雾混合气形成过程中液氨气化吸热导致喷雾中心区域降温效果明显,降温高达100K;氨较高的汽化潜热使之较难蒸发,喷雾边缘处氨的质量分数多在0.1上下。利用特征时间燃烧模型对液氨喷雾燃烧过程进行初步计算,可以较好地模拟整个燃烧过程。关键词:氨;高压直喷;喷雾燃烧;数值模拟中图分类号:TK421.2文献标志码:A文章编号:1001-4357(2023)03-0001-06NumericalSimulationandExperimentalVerificationofSprayCombustionofHigh-PressureLiquidAmmoniaWANGNing1,LITie1,2,ZHOUXinyi1,2,CHENRun1,2,LIShiyan1,2,YIPing1,2(1.StateKeyLaboratoryofOceanEngineering,ShanghaiJiaoTongUniversity,Shanghai200240,China;2.InstituteofPowerPlantsandAutomation,ShanghaiJiaoTongUniversity,Shanghai200240,China)Abstract:Numericalsimulationandexperimentalverificationofthemixtureformationandcombustionprocessofliquidammoniaspraywerecarriedout.Accordingtothegasandliquidpenetrationdataobtainedintheexperiment,theparametersofthethree-dimensionalmodelwerecalibrated.Theresultsshowthat:Thespraymodelcanaccuratelypredictthepenetrationanddevelopmentprocessofliquidammoniasprayunderhightemperatureandhighpressureconditions;Duringtheformationofthespraymixture,thevaporizationofliquidammoniaabsorbsheat,resultinginasignificantcoolingeffectinthecenterofthesprayashighas100K;Duetothepoorevaporationcausedbythehighlatentheatofvaporizationofammonia,themassfractionofammoniaatthesprayedgeismostlyaround0.1.Thecombustionprocessofammoniasprayispreliminarilycalculatedbythecharacteristictimecombustionmodel,whichcansimulatethewholecombustionpr...