多力场耦合条件下T型圆管通道内流体热混合机理研究

李桉琦; 苏博; 林梅; 王秋旺

doi:10.7652/xjtuxb202501008

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多力场耦合条件下T型圆管通道内流体热混合机理研究

更新时间：2026-01-06

- 多力场耦合条件下T型圆管通道内流体热混合机理研究
- Research on the Thermal Mixing Mechanism of Fluids in a Circular T-Junction under Multi-Force Field Coupling Conditions
- 西安交通大学学报 2025年59卷第1期页码：78-92
- 作者机构：
  
  西安交通大学能源与动力工程学院， 710049，西安
- 作者简介：
  
  李桉琦（2000—），男，硕士生；
  林梅（通信作者），女，研究员。
- 基金信息：
  
  国家自然科学基金资助项目(51976159)
- DOI：10.7652/xjtuxb202501008
  中图分类号： TK121
- 收稿：2024-06-07，
  
  网络首发：2024-09-27，
  
  纸质出版：2025-01-10
- 稿件说明：
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李桉琦, 苏博, 林梅, 等. 多力场耦合条件下T型圆管通道内流体热混合机理研究[J]. 西安交通大学学报, 2025,59(1):78-92.

LI Anqi, SU Bo, LIN Mei, et al. Research on the Thermal Mixing Mechanism of Fluids in a Circular T-Junction under Multi-Force Field Coupling Conditions[J]. Journal of Xi’an Jiaotong University, 2025, 59(1): 78-92.
李桉琦, 苏博, 林梅, 等. 多力场耦合条件下T型圆管通道内流体热混合机理研究[J]. 西安交通大学学报, 2025,59(1):78-92. DOI： 10.7652/xjtuxb202501008.

LI Anqi, SU Bo, LIN Mei, et al. Research on the Thermal Mixing Mechanism of Fluids in a Circular T-Junction under Multi-Force Field Coupling Conditions[J]. Journal of Xi’an Jiaotong University, 2025, 59(1): 78-92. DOI： 10.7652/xjtuxb202501008.

摘要

针对海洋动力平台和船舶动力装置中T型圆管通道内冷热流体间的热混合机理尚不清楚的问题，利用大涡模拟方法，对不同支管布置方式高温高压工况下（运行压力为10 MPa，进口流体温差为275 K，摇摆雷诺数为41 500）的多力场耦合T型圆管通道内流体热混合机理进行数值研究。利用提出的混合系数定量评价了不同布置方式下T型圆管通道内流体混合效果，利用均方根温度定量评价了不同布置方式下T型圆管通道管壁处温度脉动情况。结果表明：剪切层和尾迹区内涡结构与温度场存在时间和空间上的协同机制，且涡脱落频率和温度脉动频率基本相同，脱落频率为19.3 Hz；附加惯性力引起T型圆管通道内涡结构和温度场在时间和空间上周期性变化，加速了流体混合过程，削弱了浮升力和重力引起的热分层现象，同时增大了流体域内温度波动，长度约为10.2

（

为主管内径）；与对应的静止工况相比，支管竖直向上、水平和竖直向下布置时，摇摆条件下混合系数分别增大了10.8%、18.3%和27.8%；摇摆条件竖直向下布置时，管壁处温度均方根峰值最大为0.16，约为静止工况的2倍。因此，支管竖直向上布置时，热混合效果最好，热分层现象最弱，在实际应用中应被优先考虑。

Abstract

In response to the unclear thermal mixing mechanism between hot and cold fluids in the circular T-junctions of marine power platforms and ship power devices

the large eddy simulation method is employed to investigate fluid thermal mixing under high temperature and high pressure conditions. This study examines different branch pipe arrangements with a working pressure of 10 MPa

an inlet fluid temperature difference of 275 K

and a swing Reynolds number of 41 500

all under multi-force field coupling conditions. The proposed mixing coefficient is employed to quantitatively assess the fluid mixing effect within the circular T-junction

while the root mean square temperature is used to evaluate temperature fluctuations at the wall of the circular T-junction

under different branch pipe configurations. The results reveal a temporal and spatial synergistic mechanism between the vortex structure and temperature field in the shear layer and wake region. Notably

the vortex shedding frequency aligns closely with the temperature fluctuation frequency at corresponding positions

with a shedding frequency of 19.3 Hz. The additional inertial force induces periodic changes in both the vortex structure and temperature field within the circular T-junction

accelerating the fluid mixing process. This effect mitigates the thermal strati

fication phenomenon caused by buoyancy and gravity

resulting in increased temperature fluctuations in the fluid domain

with a characteristic length of approximately 10.2

. Compared to static conditions

mixing coefficients increase by 10.8%

18.3%

and 27.8% for branch pipes arranged vertically upwards

horizontally

and vertically downwards under swing conditions

respectively. The maximum peak of the root mean square temperature for T-junctions arranged vertically downwards under swinging conditions reaches 0.16

approximately double that of stationary conditions. Therefore

when branch pipes are arranged vertically upwards

the thermal mixing effect is optimal

and thermal stratification is minimized

making this arrangement preferable for practical applications.

关键词

Keywords

references

LEE K H , KIM M G , LEE J I , et al . Recent advances in ocean nuclear power plants [J ] . Energies , 2015 , 8 ( 10 ): 11470 - 11492 .

董海防 . 海洋核动力平台发展研究综述 [J ] . 船舶工程 , 2019 , 41 ( 11 ): 5 - 10 .

DONG Haifang . A summary of research on the development of marine nuclear power platform [J ] . Ship Engineering , 2019 , 41 ( 11 ): 5 - 10 .

李慧 , 赵琳 , 毛英 . 海况干扰下潜艇六自由度运动分析 [J ] . 哈尔滨工程大学学报 , 2017 , 38 ( 1 ): 94 - 100 .

LI Hui , ZHAO Lin , MAO Ying . Analysis of six-degree-of-freedom motion in submarines under sea disturbance [J ] . Journal of Harbin Engineering University , 2017 , 38 ( 1 ): 94 - 100 .

WAKAMATSU M , NEI H , HASHIGUCHI K . Attenuation of temperature fluctuations in thermal striping [J ] . Journal of Nuclear Science and Technology , 1995 , 32 ( 8 ): 752 - 762 .

Institute for Energy and Transport . Development of a European procedure for assessment of high cycle thermal fatigue in light water reactors: final report of the NESC-thermal fatigue project [EB/OL ] . ( 2014-09-12 ) [ 2024-05-22 ] . https://op.europa.eu/en/publication-detail/-/publication/f74e08dd-b6f1-45ec-b985-a378067f16af/language-en https://op.europa.eu/en/publication-detail/-/publication/f74e08dd-b6f1-45ec-b985-a378067f16af/language-en .

SELVAM P K , KULENOVIC R , LAURIEN E . Large eddy simulation on thermal mixing of fluids in a T-junction with conjugate heat transfer [J ] . Nuclear Engineering and Design , 2015 , 284 : 238 - 246 .

SELVAM P K , KULENOVIC R , LAURIEN E . Experimental and numerical analyses on the effect of increasing inflow temperatures on the flow mixing behavior in a T-junction [J ] . International Journal of Heat and Fluid Flow , 2016 , 61 ( Part B ): 323 - 342 .

EVRIM C , LAURIEN E . Numerical study of thermal mixing mechanisms in T-junctions [J ] . Applied Thermal Engineering , 2021 , 183 ( Part 1 ): 116155 .

EVRIM C , LAURIEN E . Effect of the Reynolds and Richardson numbers on thermal mixing characteristics [J ] . International Journal of Heat and Mass Transfer , 2021 , 169 : 120917 .

鄢炳火 , 于雷 , 杨燕华 . 摇摆条件下矩形通道内层流传热特性的数学分析 [J ] . 核动力工程 , 2010 , 31 ( 6 ): 70 - 74 .

YAN Binghuo , YU Lei , YANG Yanhua . Mathematical analysis of heat transfer characteristics of laminar flow in a rectangular channel in rolling motion [J ] . Nuclear Power Engineering , 2010 , 31 ( 6 ): 70 - 74 .

WANG Chang , WANG Shaowu , WANG Hao , et al . Investigation of flow pulsation characteristic in single-phase forced circulation under rolling motion [J ] . Annals of Nuclear Energy , 2014 , 64 : 50 - 56 .

WANG Chang , LI Xiaohui , WANG Hao , 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 .

CHEN Chong , WU Wei , LI Liangcai , et al . Heat transfer characteristics of oscillating flow in a narrow channel under rolling motion [J ] . Annals of Nuclear Energy , 2017 , 110 : 668 - 678 .

SU Bo , ZHU Ziliang , WANG Xiaoyu , et al . Effect of temperature difference on the thermal mixing phenomenon in a T-junction under inflow pulsation [J ] . Nuclear Engineering and Design , 2020 , 363 : 110611 .

SU Bo , ZHU Ziliang , KE Hanbing , et al . Large eddy simulation of flow and mixing characteristics in a T-junction under inflow pulsation [J ] . Applied Thermal Engineering , 2020 , 181 : 115924 .

SU Bo , HUANG Kexin , LIN Mei , et al . Experimental investigation on the flow patterns in a T-junction under steady and rolling motion conditions using PLIF [J ] . Chemical Engineering Journal , 2023 , 465 : 142772 .

ADDAD Y , GAITONDE U , LAURENCE D , et al . Optimal unstructured meshing for large eddy simulations [M ] // MEYERS J , GEURTS B J , SAGAUT P . Quality and Reliability of Large-Eddy Simulations . Dordrecht, Netherlands : Springer Netherlands , 2008 : 93 - 103 .

NICOUD F , DUCROS F . Subgrid-scale stress modelling based on the square of the velocity gradient tensor [J ] . Flow Turbulence and Combustion , 1999 , 62 ( 3 ): 183 - 200 .

TAN Sichao , SU G H , GAO Puzhen . Experimental and theoretical study on single-phase natural circulation flow and heat transfer under rolling motion condition [J ] . Applied Thermal Engineering , 2009 , 29 ( 14/15 ): 3160 - 3168 .

兰述 . 摇摆条件下瞬变流动传热特性研究 [D ] . 哈尔滨 : 哈尔滨工程大学 , 2014 : 40 - 64 .

王占伟 . 摇摆运动下冷却剂低流速流动、传热特性研究 [D ] . 哈尔滨 : 哈尔滨工程大学 , 2013 : 36 - 70 .

NIST . Thermophysical properties of fluid systems [EB/OL ] . [ 2024-05-22 ] . https://webbook.nist.gov/chemistry/fluid/ https://webbook.nist.gov/chemistry/fluid/ .

WANG Biaoxin , SU Bo , ZHENG Wei , et al . Experimental study on flow rate and pressure drop characteristics in T-junction pipes under rolling conditions [J ] . Physics of Fluids , 2024 , 36 ( 4 ): 045111 .

SU Bo , LIN Mei , WANG Qiuwang . Study on the flow mixing of hot and cold fluids in the T-junction under rolling motion condition [J ] . Nuclear Engineering and Design , 2023 , 403 : 112126 .

刘超群 . Liutex-涡定义和第三代涡识别方法 [J ] . 空气动力学学报 , 2020 , 38 ( 3 ): 413 - 431 .

LIU Chaoqun . Liutex-third generation of vortex definition and identification methods [J ] . Acta Aerodynamica Sinica , 2020 , 38 ( 3 ): 413 - 431 .

KICKHOFEL J , VALORI V , PRASSER H M . Turbulent penetration in T-junction branch lines with leakage flow [J ] . Nuclear Engineering and Design , 2014 , 276 : 43 - 53 .

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