文章编号:1009−444X(2022)04−0347−06气体燃烧室中热流场与生成NOx浓度场的数值模拟研究张诺楠,郭韵(上海工程技术大学机械与汽车工程学院,上海201620)摘要:对于一种燃气燃烧器,选取合适的燃烧室尺寸进行匹配,进而构成一个完整的计算区域.天然气燃料和助燃空气通过该燃气燃烧器喷入燃烧室实现完整燃烧过程.通过简化燃气燃烧器完成几何建模,使用热流与燃烧分析软件对计算区域进行数值模拟,选用Realizablek-ε湍流模型、ED燃烧模型、DO辐射模型及热力型NOx生成模型,探究过量空气系数α对该燃气燃烧器燃烧过程的影响,得出其温度场及生成NOx浓度场的相关云图及分布情况并进行分析.当过量空气系数α=1.1时,NOx浓度最大.研究结果可为相关研究实验和设计低NOx燃烧器提供参考依据.关键词:燃气燃烧器;氮氧化物;数值模拟;过量空气系数中图分类号:TK17文献标志码:ANumericalsimulationofheatflowfieldandNOxconcentrationfieldingascombustorZHANGNuonan,GUOYun(SchoolofMechanicalandAutomotiveEngineering,ShanghaiUniversityofEngineeringScience,Shanghai201620,China)Abstract:Forakindofgasburner,theappropriatesizeofthecombustionchamberisselectedtomatch,andthenacompletecalculationareawasformed.Naturalgasfuelandcombustionairwereinjectedintothecombustionchamberthroughthegasburnertorealizethecompletecombustionprocess.Bysimplifyingthegasburnertocompletegeometricmodeling,heatflowandcombustionanalysissoftwarewereusedfornumericalsimulationofthecalculationarea,andtheRealizablek-εturbulencemodel,EDcombustionmodel,DOradiationmodelandthermalNOxgenerationmodelwereselectedtoexploretheinfluenceofexcessaircoefficientαonthecombustionprocessofthegasburner.ThecloudimageanddistributionoftemperaturefieldandNOxconcentrationfieldwereobtainedandanalyzed.Whentheexcessaircoefficientα=1.1,theNOxconcentrationreachedthemaximum.TheresearchresultscanprovidereferenceforrelevantresearchexperimentsanddesignoflowNOxburners.Keywords:gasburner;nitrogenoxide;numericalsimulation;excessaircoefficient收稿日期:2022−05−02基金项目:国家自然科学基金项目资助(51606116);上海市科委长三角科技联合攻关领域项目资助(19195810800)作者简介:张诺楠(1996−),女,在读...