海洋条件下窄矩形通道自然循环流动阻力特性
摘要
对海洋条件下窄矩形通道内自然循环流动阻力特性进行了实验研究。结果发现在本实验范围内,摇摆对层流摩擦阻力系数影响有限,但对湍流摩擦阻力系数影响较大,并对其理论计算公式进行修正,修正后的计算值与实验结果符合良好。对过渡区,拟合出新的摩阻系数计算公式。结果还发现在正向运动过程中转捩雷诺数比负向运动过程转捩雷诺数小。增大振幅、频率,减小功率均会促进转捩,但对正向运动过程影响更显著。
引文
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[2]P.Naphade,A.Borgohain,R.ThundilKaruppa Raj,etal Experimental and CFD Study on Natural circulation Phenomenon in Lead Bismuth Eutectic Loop[J].Procedia Engineering,2013(64):936-945.
[3]YANG R C,LIU R L,ZHONG Y,et al.Experimenta study on convective heat transfer of water flow in a heated tube under natural circulation[J].Nuclear Engineering and Design,2006(236):1902-1908.
[4]Tan S C,SU G H,GAO P Z.Experimental and theoretical study on single-phase natural circulation flow and heat transfer under rolling motion condition[J]Applied Thermal Engineering 2009(29):3160-3168.
[5]WANG C,LI X H,WANG H,et al.Experimental study on single-phase heat transfer of natural circulation in circular pipe under rolling motion condition[J].Nuclear Engineering and Design,2014(273):497-504.
[6]幸奠川.摇摆对矩形通道内流动阻力特性的影响研究[D].哈尔滨工程大学,2013.
[7]谢清清,阎昌琪,曹夏昕,等.窄矩形通道内单相水阻力特性实验研究[J].原子能科学技术,2012,46(2):181-185.
[8]谭思超,王占伟,兰述,等.摇摆运动下窄矩形通道单相瞬变流动时均阻力特性研究[J].核动力工程,2013(34):51-54.
[9]阎昌琪,幸奠川,曹夏昕,等.摇摆条件下窄通道内单相水流态转捩特性[J].哈尔滨工程大学学报,2012,33(6):791-795.
[10]M.Spiga,G.L.Morini.A symmetric solution for velocity profile in laminar flow through rectangular ducts[J].International Communications in Heat and Mass Transfer,1994,21(4):469-475.
[11]LEON T.ROMAN U.Two-phase gas-liquid flow in rectangular channels[J].Chemical Engineering Science,1984,39(4):751-765.