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双弯弯管水力特性数值模拟分析

305    2024-05-24

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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。
参考文献
[1] 魏志, 王玉璋. 阀体后90°圆形弯管内部流场的数值模拟[J]. 动力工程学报, 2013, 33(8): 595-599.
WEI Z, WANG Y Z. Numerical simulation on inner flow in a 90° circular-sectioned bend with fore-end valve[J]. Journal of Chinese Society of Power Engineering, 2013, 33(8): 595-599.
[2] 李静, 杨俊红, 黄涛, 等. 雷诺数和半径比对90°圆弧弯管流动特性的数值研究[J]. 机械科学与技术, 2017, 36(10): 1491-1497.
LI J, YANG J H, HUANG T, et al. Numerically studying effects of reynolds number and radius ratio on flow characteristics of 90° arc bend pipe[J]. Mechanical Science and Technology for Aerospace Engineering, 2017, 36(10): 1491-1497.
[3] 王秋良, 王振华, 李文昊, 等. 基于CFD的新型三通管结构优化与水力特性分析[J]. 中国农村水利水电, 2020(8): 203-210.
WANG Q L, WANG Z H, LI W H, et al. Structural optimization and hydraulic characteristics analysis of a new three-way pipe based on CFD[J]. China Rural Water and Hydropower, 2020(8): 203-210.
[4] 贺益英, 赵懿珺, 孙淑卿, 等. 输水管线中弯管局部阻力的相邻影响[J]. 水利学报, 2004(2): 17-20.
HE Y Y, ZHAO Y J, SUN S Q, et al. Interaction of local loss between bends in pipe line[J]. Journal of Hydraulic Engineering, 2004(2): 17-20.
[5] 贺益英, 赵懿珺, 孙淑卿, 等. 弯管局部阻力系数的试验研究[J]. 水利学报, 2003(11): 54-58.
HE Y Y, ZHAO Y J, SUN S Q, et al. Experimental study on local loss coefficient of bend in pipeline[J]. Journal of Hydraulic Engineering, 2003(11): 54-58.
[6] 赵懿珺, 贺益英. 直角Z形组合双弯管流动特性的研究[J]. 水利学报, 2006(7): 778-783.
ZHAO Y J, HE Y Y. Hydraulic characteristics of Z-type pipe combination with two similar rectangular bends[J]. Journal of Hydraulic Engineering, 2006(7): 778-783.
[7] 王永成. 基于CFD的Z形弯管流场模拟分析及其结构优化[J]. 液压气动与密封, 2014, 34(9): 29-32.
WANG Y C. Flow field simulation analysis and structural optimization of Z-shaped bend pipe based on CFD[J]. Hydraulics Pneumatics & Seals, 2014, 34(9): 29-32.
[8] 叶飞, 高学平, 贾秋影, 等. 输水管系弯曲管路的水头损失研究[J]. 中国给水排水, 2011, 27(7): 67-70.
YE F, GAO X P, JIA Q Y, et al. Research on head loss of curved water conveying pipeline[J]. China Water & Wastewater, 2011, 27(7): 67-70.
[9] 张昕, 纪昌知, 敏姜, 等. 相对粗糙度和雷诺数对90°弯管局部阻力系数的影响[J]. 水力发电学报, 2013, 32(4): 88-93.
ZHANG X, JI C Z, JIANG M, et al. Influence of relative roughness and Reynolds number on local resistance coefficient of 90°-bend pipeline[J]. Journal of Hydroelectric Engineering, 2013, 32(4): 88-93.
[10] 孙业志, 胡寿根, 赵军, 等. 不同雷诺数下90°弯管内流动特性的数值研究[J]. 上海理工大学学报, 2010, 32(6): 525-529.
SUN Y Z, HU S G, ZHAO J, et al. Numerical study on flow characteristics of 90° bend pipe under different reynolds number[J]. Journal of University of Shanghai for Science and Technology, 2010, 32(6): 525-529.
[11] 杨湘隆, 黄社华, 熊渊. 圆管弯道内部流动数值模拟及湍流模式比较研究[J]. 西安理工大学学报, 2010, 26(1): 116-120.
YANG X L, HUANG S H, XIONG Y. A comparative study of numerical simulation of turbulent flow in bending duct of circular-section and turbulence models[J]. Journal of Xi'an University of Technology, 2010, 26(1): 116-120.
[12] 陈晓, 赵懿珺, 贺益英, 等. 90°弯管Z形组合局部阻力特性研究[J]. 人民黄河, 2015, 37(5): 107-111.
CHEN X, ZHAO Y J, HE Y Y, et al. Nummerical simulation investigation of local resistance characteristics of Z-type combination with two 90° bends[J]. Yellow River, 2015, 37(5): 107-111.
[13] 邵欣, 王涛, 高芦宝, 等. 基于CFD的超声波气体流量计过渡区内流场检测优化研究[J]. 中国测试, 2021, 47(10): 114-122.
SHAO X, WANG T, GAO L B, et al. Study on flow field detection and optimization in transition zone of ultrasonic gas flowmeter based on CFD[J]. China Measurement &Test, 2021, 47(10): 114-122.
[14] YE K, ZHANG Y L, SHENG X Y, et al. Numerical analysis of the flow behavior in a helically coiled once through steam generator[J]. Nuclear Engineering and Design, 2018, 330: 187-198.
[15] 陈江林, 吕宏兴, 石喜, 等. T型三通管水力特性的数值模拟与试验研究[J]. 农业工程学报, 2012, 28(5): 73-77.
CHEN J L, LÜ H X, SHI X, et al. Numerical simulation and experimental study on hydrodynamic characteristics of T-type pipes[J]. Transactions of the Chinese Society of Agricultural Engineering, 2012, 28(5): 73-77.
[16] 成锋娜, 常海萍, 田兴江, 等. 90°多弯管阻力系数计算方法[J]. 航空发动机, 2016, 42(1): 6-10.
CHENG F N, CHANG H P, TIAN X J, et al. Calculation method of resistance coefficient in 90° combined bends[J]. Aeroengine, 2016, 42(1): 6-10.