作者：吴森林¹, 王秋良², 甘杜芬³, 李恩¹, 王一帆¹, 刘云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：双弯弯管;夹角;数值模拟;水力特性;局部阻力系数

摘要：

为探究不同夹角、流道结构、雷诺数下双弯弯管水力特性，揭示其不同夹角、流道结构、雷诺数、局部水头损失相关关系，以DN192 mm为例，建立弯弯、弯折、折弯、折折4种流道不同角度的三维结构模型，通过数值模拟计算和后处理，得到DN192 mm双弯弯管不同夹角、流道结构、雷诺数下水力特性及流场分布。结果表明：DN192 mm双弯弯管的局部阻力系数与夹角主要呈现二次抛物线关系变化，随着弯曲角度的增大呈先减小后增大的趋势，所有组合弯管在角度为π/6时局部阻力损失系数达到最小；相同条件下，弯弯组合弯管结构最好，弯折组合与折弯组合较好，折折组合最差；在双弯组合弯管设计中，入流方向与过渡段夹角应在π/6左右为宜。

Numerical calculation analysis on hydraulic characteristic of double-bend elbow
WU Senlin¹, WANG Qiuliang², GAN Dufen³, LI En¹, WANG Yifan¹, LIU Yun¹
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 Technology, Guilin 541000, China
Abstract: In order to explore the hydraulic characteristics of double-bend elbows under different included angles, flow channel structures and Reynolds numbers, and to reveal the correlation between different included angles, flow channel structures, Reynolds numbers, and local head loss. DN192 mm was used as an example , Three-dimensional structure models of four different angles of runners, including bending-bending, bending-fold, fold-bending, and fold-fold were established. Calculation and post-processing by numerical simulation, the different angles of DN192 mm double-bend elbows, Flow channel structure, hydraulic properties at Reynolds number and flow field distribution. The results show that the local resistance coefficient and the included angle of the DN192 mm double-bend elbow mainly show a quadratic parabolic relationship, and with the increase of the bending angle, it first decreases and then increases. When the included angle of all combined elbows is π/6, the local resistance loss coefficient reached the minimum; Under the same conditions, the bending-bending combined pipe structure is the best, the bending-fold combination and the fold-bending combination are better, and the fold-fold combination is the worst; In the design of double-bend combined elbow, the angle between the inflow direction and the transition section should be about π/6.
Keywords: double-bend elbow;included angle;numerical calculation;hydraulic characteristics;local resistance coefficient
2024, 50(5):19-28  收稿日期: 2022-04-16;收到修改稿日期: 2022-07-06
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,专业方向为流体力学。
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