基于RELAP5的运动条件下并联双通道流动不稳定性研究
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摘要
随着船用核动力装置的广泛应用,运动条件引起的热工水力现象逐渐受到重视。反应堆堆芯内存在大量并联通道,通过在RELAP5程序的动量方程源项中添加运动条件引起的附加力,开展了倾斜、起伏及摇摆等典型单一运动条件及其耦合运动条件下的并联双通道在强迫循环下的流动不稳定性研究。对比了静止条件及不同运动条件下的不稳定性边界曲线,结果表明,强迫循环下运动条件对并联通道流动不稳定性的影响较小。相同过冷度数下,运动条件与静止条件的相变数差别在2%以下。
As the marine nuclear power device is operated widely,the thermal hydraulic phenomenon caused by motion conditions is considered significantly.Since many parallel channels exist in the reactor core,the study of flow instability in parallel double channels under single and coupled motion conditions was carried out by modifying the source term in momentum equation adopted in RELAP5 code.The marginal stability boundary(MSB)curves under static and motion conditions were compared,and it is shown that the effect of different motion conditions on flow instability is very small under forced circulation.With the same subcooled number(Nsub),the difference between phase change numbers(Npch)of static condition and motion condition is under 2%.
As the marine nuclear power device is operated widely,the thermal hydraulic phenomenon caused by motion conditions is considered significantly.Since many parallel channels exist in the reactor core,the study of flow instability in parallel double channels under single and coupled motion conditions was carried out by modifying the source term in momentum equation adopted in RELAP5 code.The marginal stability boundary(MSB)curves under static and motion conditions were compared,and it is shown that the effect of different motion conditions on flow instability is very small under forced circulation.With the same subcooled number(Nsub),the difference between phase change numbers(Npch)of static condition and motion condition is under 2%.
引文
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[2]ZHOU Yuan,YAN Xiao,WANG Yanlin,et al.Experimental study of two phase flow instability in parallel rectangular channels[J].Annuals of Nuclear Energy,2012,50:103-110.
[3]LU Xiaodong,WU Yingwei,ZHOU Linglan,et al.Theoretical investigations on two-phase flow instability in parallel channels under axial nonuniform heating[J].Annuals of Nuclear Energy,2014,63:75-82.
[4]GUO Yun,QIU Suizheng,SU Guanghui,et al.The influence of ocean conditions on two-phase flow instability in a parallel multi-channel system[J].Annuals of Nuclear Energy,2008,35:1 598-1 605.
[5]QIAN Libo,DING Shuhua,QIU Suizheng.Research on two-phase flow instability in parallel rectangular channels[J].Annuals of Nuclear Energy,2014,65:47-59.
[6]ZHANG Youjia,SU Guanghui,QIU Suizheng,et al.Numerical research on oscillation of twophase flow in multichannels under rolling motion[J].Nuclear Engineering and Design,2011,241:4 704-4 713.
[7]RANSOM V H,TRAPP J,WAGNER R.RELAP5/MOD3.3code manual,VolumeⅣ:Models and correlations,NUREG/CR-5535/Rev 1[R].USA:Idaho National Engineering Laboratory,2001.
[8]苏光辉,秋穗正,田文喜,等.核动力系统热工水力计算方法[M].北京:清华大学出版社,2013:325-336.
[9]谭长禄,张虹,赵华.基于RELAP5的海洋条件下反应堆热工水力系统分析程序开发[J].核动力工程,2009,30(6):53-56.TAN Changlu,ZHANG Hong,ZHAO Hua.Development of ocean-condition code based on RELAP5[J].Nuclear Power Engineering,2009,30(6):53-56(in Chinese).
[10]钱立波,田文喜,秋穗正,等.一维冷却剂通道海洋条件附加力模型研究[J].核动力工程,2012,33(2):104-109.QIAN Libo,TIAN Wenxi,QIU Suizheng,et al.Research on the model of additional forces of ocean conditions in one-dimensional coolant channel[J].Nuclear Power Engineering,2012,33(2):104-109(in Chinese).
[11]KAKAC S,BON B.A review of two-phase flow dynamic instabilities in tube boiling systems[J].International Journal of Heat and Mass Transfer,2008,52:399-433.
[12]ZHANG Y J,SU G H,YANG X B,et al.Theoretical research on two-phase flow instability in parallel channels[J].Nuclear Engineering and Design,2009,239:1 294-1 303.
[13]RUSPINI C L,MARCEL P C,CLAUSSE A.Two-phase flow instabilities:A review[J].International Journal of Heat and Mass Transfer,2014,71:521-548.
[14]MA Yingying,TIAN Wenxi,SU Guanghui,et al.Theoretical research on flow instability in parallel channels under motion conditions[C]∥Proceedings of the 21st International Conference on Nuclear Engineering.Chengdu:[s.n.],2013.
[15]ISHII M.Thermally induced flow instabilities in two-phase mixtures in thermal equilibrium[D].Atlanta:Georgia Institute of Technology,1971.
[16]COLOMBO M,CAMMI A,PAPINI D,et al.RELAP5/MOD3.3study on density wave instabilities in single channel and two parallel channels[J].Progress in Nuclear Energy,2012,52:15-23.
[17]马盈盈,钱立波,田文喜,等.耦合运动对流动不稳定边界的影响研究[J].核动力工程,2015,36(4):140-144.MA Yingying,QIAN Libo,TIAN Wenxi,et al.Research on the effect of coupled motions on flow instability boundary[J].Nuclear Power Engineering,2015,36(4):140-144(in Chinese).