作者：吴森林1, 王秋良2, 甘杜芬3, 刘云1, 李恩1, 王一帆1
作者单位：1. 长江大学石油工程学院, 湖北 武汉 430100;
2. 深圳市水务规划设计院股份有限公司, 广东 深圳 518000;
3. 桂林电子科技大学计算机工程学院, 广西 桂林 541000
关键词：CFD;盲三通;流动与传热;影响因素;正交试验
摘要：
该文研究盲三通的流动与传热特性，利用Solidworks建立盲三通三维物理模型，运用CFD软件对盲三通流动与换热进行数值计算，探讨雷诺数、夹角、盲端长度以及支管直径对盲三通流动与换热的影响，并结合正交试验分析各影响因素的显著性强弱。努塞尔数Nu、压降Δp随着雷诺数Re、夹角θ的增大而增大，随着盲端长度L3、支管直径d的增大而减小；阻力系数f随着雷诺数Re、盲端长度L3、支管直径d的增大而减小，随着夹角θ的增大而增大。支管近右壁处流体流速增大，入口主管段区域温度梯度分布不明显；利用多元非线性拟合给出盲三通流动与换热准则关联式；各因素对阻力系数f的显著性强弱为：支管管径D>夹角B>雷诺数A>盲端长度C；对努塞尔数Nu和压降Δp的显著性强弱为：雷诺数A>支管管径D>夹角B>盲端长度C。盲三通压降的最优组合为A1B5C5D5，阻力系数最优组合为A3B1C3D5，努塞尔数最优组合为A5B3C2D1。研究结果可为盲三通设计与优化提供基础依据。
Numerical simulation and influencing factors of flow and heat transfer in blind tee based on CFD
WU Senlin, WANG Qiuliang, GAN Dufen, LIU Yun, LI En, WANG Yifan
1. Petroleum Engineering College, Yangtze University, Wuhan 430100, China;
2. Shenzhen Water Planning & Design Institute Co., Ltd., Shenzhen 518000, China;
3. School of Computer Engineering, Guilin University of Electronic Science and Technology, Guilin 541000, China
Abstract: Study the flow and heat transfer characteristics of blind tee. Solidworks was used to establish a three-dimensional physical model of blind tee, and CFD software was used to numerically calculate the flow and heat transfer of blind tee. The influence of the diameter of the branch pipe on the flow and heat transfer of the blind tee, and combined with the orthogonal test to analyze the significance of each influencing factor. The Nusselt number Nu and the pressure drop Δp increase with the increase of the Reynolds number Re and the included angle θ, and decreased with the increase of the blind end length L3 and the diameter d of the branch pipe; The drag coefficient f decreases with the increase of the Reynolds number Re, the blind end length L3 and the diameter d of the branch pipe, and increases with the increase of the included angle θ. The fluid velocity increases near the right wall of the branch pipe, and the temperature gradient distribution in the inlet main section is not obvious; The correlation formula of blind tee flow and heat transfer criterion is given by multivariate nonlinear fitting; the significance of each factor on the resistance coefficient was branch pipe diameter D > included angle B > Reynolds number A > blind end length C; The significance of Nusselt number Nu and pressure drop Δp was Reynolds number A > branch pipe diameter D > included angle B > blind end length C. The optimal combination of blind tee pressure drop was A1B5C5D5, the optimal combination of drag coefficient was A3B1C3D5, and the optimal combination of Nusselt number was A5B3C2D1. The research results can provide a basis for the design and optimization of blind three-way links.
Keywords: CFD;blind tee;flow and heat transfer;influencing factors;orthogonal test
2023, 49(9):46-56 收稿日期: 2022-3-30;收到修改稿日期: 2022-6-5
基金项目: 国家自然科学基金项目（51665008）；中国石油天然气集团公司气举实验基地多相流研究室开放基金资助项目（KF2021002）
作者简介: 吴森林（1997-），男，湖北咸宁市人，硕士研究生，专业方向为流动与传热。
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