中低雷诺数条件下单侧加热矩形通道内混合对流换热的实验研究
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摘要
非能动安全壳冷却系统是先进压水堆非能动安全系统的重要组成部分,其中空气对流换热的能力较差,对安全影响较大,因此本文主要研究了在大尺寸垂直单侧加热矩形通道内空气自下而上流动时的混合对流换热,用于模拟核电厂非能动安全壳冷却系统的换热情况。研究结果表明在较小雷诺数条件下自然对流的影响不能忽略且自然对流会占据主导作用;随着空气流量的增加,强迫对流换热的作用越来越明显。当前学者所用经验关系式都不能很好地体现出自然对流在混合对流中起的作用,因此本文还通过实验数据拟合了一个新的计算混合对流换热的关系式,该公式在一定雷诺数范围内与实验值能很好地符合。
The passive containment cooling system is an important part of the advanced pressurized water reactor passive safety system. The air convection heat transfer capacity is poor and has a great impact on safety. Therefore,this paper mainly studies the rectangular heating channel with large size and vertical one side heating. The mixed convective heat transfer of the inner air flowing from bottom to top is used to simulate the heat transfer of the passive containment cooling system of the nuclear power plant. The results show that the influence of natural convection can not be neglected under the condition of smaller Reynolds number and natural convection will dominate. With the increase of air flow,the effect of forced convection heat transfer becomes more and more obvious. The empirical relationship used by current scholars can not reflect the role of natural convection in mixed convection. Therefore,this paper also fits a new relational formula for calculating mixed convective heat transfer through experimental data. This formula fits well with the experimental values within a certain range of Reynolds numbers.
The passive containment cooling system is an important part of the advanced pressurized water reactor passive safety system. The air convection heat transfer capacity is poor and has a great impact on safety. Therefore,this paper mainly studies the rectangular heating channel with large size and vertical one side heating. The mixed convective heat transfer of the inner air flowing from bottom to top is used to simulate the heat transfer of the passive containment cooling system of the nuclear power plant. The results show that the influence of natural convection can not be neglected under the condition of smaller Reynolds number and natural convection will dominate. With the increase of air flow,the effect of forced convection heat transfer becomes more and more obvious. The empirical relationship used by current scholars can not reflect the role of natural convection in mixed convection. Therefore,this paper also fits a new relational formula for calculating mixed convective heat transfer through experimental data. This formula fits well with the experimental values within a certain range of Reynolds numbers.
引文
[1]林诚格.非能动安全先进压水堆核电技术[M].北京:原子能出版社,2010:1162.
[2]史鹏宇.非能动安全壳内混合对流传热比例分析及实验研究[M].北京:中国核科学技术进展报告(第二卷),核动力分卷.2009.
[3]Jackson J D,Cotton M A,Axcell B P.Review:Studies of Mixed convection in Vertical Tubes[J].Int.J.Heat and Fluid Flow,1989,10:2-15.
[4]Jackson J D,Hall W B.Influences of Buoyancy on Heat Transfer to Fluids Flowing in Vertical Tubes under Turbulent Conditions[C].Institution of Mechanical Engineers,Conference Publications,V2,Turbulent Forced Convection in Channels and Bundles,Hemisphere Publishing.1979,613-640.
[5]Cotton M A,Jackson J D.Vertical Tube Air Flows in the Turbulent Mixed Convection Regime Calculation Using a Low-Reynolds-Number k-εModel[J].Int.J.Heat Mass Transfer,1990,33:275-286.
[6]W.S.Kim,C.Talbot,B.J.Chung,J.D.Jackson.Variable Property Mixed Convection Heat Transfer to Air Flowing Through a Vertical Passage of Annular Cross Section:Part1[J].Chemical Engineering Research and Design,2002,80(3).
[7]Tian-Hua Wu,Zeyuan Xu,J.D.Jackson.Mixed Convection Heat Transfer to Water Flowing Through a Vertical Passage of Annular Cross Section:Part 2[J].Chemical Engineering Research and Design,2002,80(3).
[8]Po?kas P.Turbulent Mixed Convection in Channels for Different Orientations of Them in Space[J].Engineering Physics and Thermophysics,1996,69:738-746.
[9]Behzadmehr A,Galanis N,Laneville A.Low Reynolds Number Mixed Convection in Vertical Tubes with Uniform Wall Hear Flux[J].Int.J.Heat Mass Transfer,2003,46:4823-4833.
[10]胡珀.大平板均匀加热和温控装置:中国,201410563478.5[P].2017-11-14.
[11]杨世铭,陶文铨.传热学[M].4版.北京:高等教育出版社,2006:205-207.
[12]Cheng X,Mueller U.Turbulent Natural Convection Coupled with Thermal Radiation in Large Vertical Channels with Asymmetric Heating[J].International Journal of Heat and Mass Transfer,1998,41(12):1681-1692.
[13]刘伟,明廷臻.管内核心流分层填充多孔介质的传热强化分析[J].中国电机工程学报,2008(32):66-71.
[14]明廷臻,周程,刘伟.填充环状金属多孔介质强化传热优化分析[J].武汉理工大学学报2011,33(03):62-66.
[15]战洪仁,韩冬雪,张海松,等.圆管内层流入口段插入多孔板的传热性能分析[J].沈阳化工大学学报,2016,30(04):339-343.
[16]M.D.Kennedy,J.Woodcock,R.F.Wright&J.A.Gresham(1996)Westinghouse-Gothic Comparisons with Passive Containment Cooling Tests Using a One-to-TenScale Test Facility,Nuclear Technology,113:1,14-20,DOI:10.131 82/NT96-A35195.
[17]Jackson,J.D.and Hall,W.B.,1979,Influences of buoyancy on heat transfer to fluids flowing in vertical tubes under turbulent conditions,Advan Study Inst Book:Turbulent Forced Convection in Channels and Rod Bundles-Theory and Applications to Heat Exchangers and Reactors,2:613-640.
[2]史鹏宇.非能动安全壳内混合对流传热比例分析及实验研究[M].北京:中国核科学技术进展报告(第二卷),核动力分卷.2009.
[3]Jackson J D,Cotton M A,Axcell B P.Review:Studies of Mixed convection in Vertical Tubes[J].Int.J.Heat and Fluid Flow,1989,10:2-15.
[4]Jackson J D,Hall W B.Influences of Buoyancy on Heat Transfer to Fluids Flowing in Vertical Tubes under Turbulent Conditions[C].Institution of Mechanical Engineers,Conference Publications,V2,Turbulent Forced Convection in Channels and Bundles,Hemisphere Publishing.1979,613-640.
[5]Cotton M A,Jackson J D.Vertical Tube Air Flows in the Turbulent Mixed Convection Regime Calculation Using a Low-Reynolds-Number k-εModel[J].Int.J.Heat Mass Transfer,1990,33:275-286.
[6]W.S.Kim,C.Talbot,B.J.Chung,J.D.Jackson.Variable Property Mixed Convection Heat Transfer to Air Flowing Through a Vertical Passage of Annular Cross Section:Part1[J].Chemical Engineering Research and Design,2002,80(3).
[7]Tian-Hua Wu,Zeyuan Xu,J.D.Jackson.Mixed Convection Heat Transfer to Water Flowing Through a Vertical Passage of Annular Cross Section:Part 2[J].Chemical Engineering Research and Design,2002,80(3).
[8]Po?kas P.Turbulent Mixed Convection in Channels for Different Orientations of Them in Space[J].Engineering Physics and Thermophysics,1996,69:738-746.
[9]Behzadmehr A,Galanis N,Laneville A.Low Reynolds Number Mixed Convection in Vertical Tubes with Uniform Wall Hear Flux[J].Int.J.Heat Mass Transfer,2003,46:4823-4833.
[10]胡珀.大平板均匀加热和温控装置:中国,201410563478.5[P].2017-11-14.
[11]杨世铭,陶文铨.传热学[M].4版.北京:高等教育出版社,2006:205-207.
[12]Cheng X,Mueller U.Turbulent Natural Convection Coupled with Thermal Radiation in Large Vertical Channels with Asymmetric Heating[J].International Journal of Heat and Mass Transfer,1998,41(12):1681-1692.
[13]刘伟,明廷臻.管内核心流分层填充多孔介质的传热强化分析[J].中国电机工程学报,2008(32):66-71.
[14]明廷臻,周程,刘伟.填充环状金属多孔介质强化传热优化分析[J].武汉理工大学学报2011,33(03):62-66.
[15]战洪仁,韩冬雪,张海松,等.圆管内层流入口段插入多孔板的传热性能分析[J].沈阳化工大学学报,2016,30(04):339-343.
[16]M.D.Kennedy,J.Woodcock,R.F.Wright&J.A.Gresham(1996)Westinghouse-Gothic Comparisons with Passive Containment Cooling Tests Using a One-to-TenScale Test Facility,Nuclear Technology,113:1,14-20,DOI:10.131 82/NT96-A35195.
[17]Jackson,J.D.and Hall,W.B.,1979,Influences of buoyancy on heat transfer to fluids flowing in vertical tubes under turbulent conditions,Advan Study Inst Book:Turbulent Forced Convection in Channels and Rod Bundles-Theory and Applications to Heat Exchangers and Reactors,2:613-640.