第58卷第2期2024年2月原子能科学技术AtomicEnergyScienceandTechnologyVol.58,No.2Feb.2024交混因子对CHF关系式开发及安全裕量影响研究刘晨伟1，肖瑶1.2,＊，张伟1，陈硕²，顾汉洋2（1.上海交通大学智慧能源创新学院，上海200240；2.上海交通大学机械与动力工程学院，上海200240）摘要：采用最小偏离泡核沸腾比(MDNBR)点法开发了与子通道分析程序FLICA-IⅢF匹配的临界热流密度(CHF)关系式，利用Owen准则确定了其DNBR限值并进行统计评估。在掌握了一套完整的CHF关系式开发方法后，对比分析了不同交混因子其对应关系式的预测效果、DNBR限值以及实际最大功率。结果表明：基于实验获得的精确交混因子开发的CHF关系式具有更高的精确度与经济性。因此考虑格架交混效应的精细化子通道的工作是有价值和意义的。关键词：燃料组件；交混因子；CHF关系式；DNBR限值；安全裕量中图分类号：TL33doi:10.7538/yzk.2023.youxian.0371InfluenceofMixingFactoronSafetyMargininCHFCorrelationDevelopmentLIUChenwei',XIAOYaol.2.*,ZHANGWei',CHENShuo”,GUHanyang?(1.CollegeofSmartEnergy,ShanghaiJiaoTongUniversity,Shanghai200240,China;2.SchoolofMechanicalEngineering,ShanghaiJiaoTongUniversity,Shanghai200240,China)Abstract:Inthedevelopmentofcriticalheatflux(CHF)correlation,themixingfactorβ(i.e.,theturbulentthermaldiffusivity)isacharacteristicparameterrepresentingthecross-mixingeffectbetweensub-channels.Atpresent,themixingfactorobtainedthroughthecross-mixingexperimentisessentiallythemacroscopicequivalentquantityofaveragingthecross-mixingeffect(suchasturbulentcross-mixing,flowsweeping,etc.).Infact,themixingeffectcausedbythegridwilldecreasealongthedownstream,whichwillleadtoacertaindeviationinthelocalparameterscalculatedbytheaveragemixingfactor.TheinfluenceofthedeviationontheDNBRlimitvalueoftheCHFcorre-lationandthesafetymarginisnotclear.Thus,theCHFcorrelationmatchingwiththesub-channelanalysisprogramFLICA-IIFwasdevelopedbyusingtheminimumDNBRpointmethod.OwencriterionwasusedtodeterminetheDNBRlimit.AfterachievingthedevelopmentmethodsofCHFcorrelation,thepredictioneffect,DNBRlimitsand文献标志码：A文章编号：1000-6931(2024)02-0337-07收稿日期：2023-05-24；修回日期：2023-06-...
