偏心方圆节扩散管数值模拟

doi:10.6040/j.issn.1672-3961.0.2020.169

摘要/Abstract

摘要： 采用ANSYS Fluent对底部相切的偏心方圆节扩散管进行数值模拟。试验数据验证数值模型的准确性。比较同心方圆节与偏心方圆节流场的差异,探究扩散管长度对流场的影响,通过添加导向板对高扩散角的偏心方圆节进行优化。模拟结果表明,偏心方圆节扩散管长度与烟道总压降和流场均匀性呈非线性关系,增大扩散管长可降低局部损失。高扩散角的偏心方圆节添加导向板可降低管道局部损失,提高流场均匀性。

关键词: 偏心方圆节, 扩散管, 流场均匀性, 阻力, 数值模拟

Abstract: ANSYS Fluent was used to simulate the circular-to-rectangular transition duct. The accuracy of the numerical model was verified by experimental data. The difference between the concentric and tangent CRD(circular to rectangular duct)was compared,then the influence of the diffusion tube length on the flow field was explored, and the tangent CRD with high diffusion angle was optimized by adding deflectors. The simulation results showed that the length(diffusion angle)had a nonlinear relationship with the total pressure drop of the flue and the uniformity of the flow field. For tangent CRD with high diffusion angle, adding deflectors was more effectual to reduce local loss of the pipeline and improve the uniformity of the flow field.

Key words: tangent circular-to-rectangular transition duct, diffusion tube, flow field uniformity, resistance, numerical simulation

中图分类号:

TB126

曹洪振,祁金胜,袁宝强,杜文静,王湛. 偏心方圆节扩散管数值模拟[J]. 山东大学学报 (工学版), 2020, 50(5): 77-82.

CAO Hongzhen, QI Jinsheng, YUAN Baoqiang, DU Wenjing, WANG Zhan. Numerical simulation of the tangent circular-to-rectangular transition duct[J]. Journal of Shandong University(Engineering Science), 2020, 50(5): 77-82.

参考文献

[1] 周俊. 圆形烟风道与节能降耗[J]. 江苏锅炉, 2010(4): 40-42. ZHOU Jun. Circular flue gas duct and energy saving[J]. Jiangsu Boiler, 2010(4): 40-42.
[2] 周锐. 大容量机组圆形烟道设计特点介绍[J]. 科技信息, 2009(35): 384-385. ZHOU Rui. Design features of circular flue of large capacity unit[J]. Science and Technology Information, 2009(35): 384-385.
[3] 祁金胜, 安春国, 王湛. 矩形和圆形烟风道加固肋设计的比较[J]. 锅炉技术, 2017, 48(2): 26-29. QI Jinsheng, AN Chunguo, WANG Zhan. Comparison of stiffener design of rectangular and round flue gas and air ducts[J]. Boiler Technology, 2017, 48(2): 26-29.
[4] 祁金胜, 安春国, 柏洁, 等. 圆形烟风道支座与加固肋匹配特性[J]. 山东大学学报(工学版), 2017, 47(1): 125-130. QI Jinsheng, AN Chunguo, BAI Jie, et al. Study on matching property of supports and stiffeneron circular exhaust duct[J]. Journal of Shandong University(Engineering Science), 2017, 47(1): 125-130.
[5] 龙隽雅. 电站锅炉低温省煤器设计及前后烟道流场均匀性模拟[D]. 上海: 东华大学, 2014. LONG Junya. Design of boiler economizer and simulation of folw field about uniformity[D]. Shanghai: Donghua University, 2014.
[6] 湛含辉. 二次流原理[M]. 长沙: 中南大学出版社, 2006.
[7] 岑可法. 锅炉和热交换器的积灰、结渣、磨损和腐蚀的防止原理与计算[M]. 北京: 科学出版社, 1994.
[8] 刘忠秋. 不同管型低温省煤器顺排管束性能对比研究[J]. 电力系统装备, 2019, 1(1): 236-237. LIU Zhongqiu. Comparative study on performance of smooth tube bundles of different tubular low temperature economizers[J]. Electric Power System Equipment, 2019, 1(1): 236-237.
[9] REICHERT B A, HINGST W R, OKIISHI T H. Circular-to-rectangular transition duct flow without and with inlet swirl[J]. Journal of Propulsion and Power, 1994, 10(1): 88-94.
[10] MIAU J, CHOU J H, LIN C K, et al. Flow distortion in a circular-to-rectangular transition duct[J]. Aiaa Journal, 1990, 28(8): 1447-1456.
[11] PAO S P, CARLSON J R, ABDOL-HAMID K S. Computational investigation of circular-to-rectangular transition ducts[J]. Journal of Propulsion & Power, 1991, 10(1): 95-100.
[12] 钱成绪, 王文元, 蔡希浩. 火力发电厂烟风煤粉管道设计技术规程:DL/T 5121—2000[S]. 北京: 中国电力出版社, 2010.
[13] 陈锦昌, 邓华东, 朱东辉.一般方圆节的放样探讨和参数化设计[J]. 图学学报, 2007, 28(5): 93-98. CHEN Jinchang, DENG Huadong, ZHU Donghui. Development of a normal rectangle-circle connector and it's parameterized design[J]. Journal of Engineering Graphics, 2007, 28(5): 93-98.
[14] SHIH T H, LIOU WW, SHABIR A, et al. A new eddy viscosity model for high Reynolds number turbulent flows model development and validation[J]. Computers Fluids, 1995, 24(3): 227-238.
[15] 于飞, 刘明, 李卫东, 等. 90°矩形截面弯头内置导流板的布置优化研究[J]. 动力工程学报, 2015, 35(2): 147-152. YU Fei, LIU Ming, LI Weidong, et al. Layout optimization of guide plates in a 90SymbolpB@ degree elbow with rectangular cross section[J]. Journal of Chinese Society of Power Engineering, 2015, 35(2): 147-152.
[16] 邹高万. 粘性流体力学[M]. 北京: 国防工业出版社, 2013.
[17] 杨世铭, 陶文铨. 传热学[M].4版. 北京: 高等教育出版社, 2006.
[18] DAVIS D O, GESSNER F B. Experimental investigation of turbulent flow through a circular-to-rectangular transition duct[J]. AIAA Journal, 1992, 30(2): 367-375.
[19] 李坦, 靳世平, 黄素逸. 流场速度分布均匀性评价指标比较与应用研究[J]. 热力发电, 2013, 42(11): 60-63. LI Tan, JIN Shiping, HUANG Suyi. Evaluation indices of flow velocity distribution uniformity:comparison and application[J]. Thermal Power Generation, 2013, 42(11): 60-63.
[20] TAO Hongge, CHEN Huanxin, XIE Junlong, et al. An alternative approach to quantifying fluid flow uniformity based on area-weighted average velocity and mass-weighted average velocity[J]. Energy and Buildings, 2012, 45: 116-123.

相关文章 15

[1]	刘启明,王文辉,潘英楠,高要辉,郑程程,贺鹏. 厚度缺陷对初支结构安全性的影响及风险评价[J]. 山东大学学报 (工学版), 2025, 55(5): 165-178.
[2]	义扬,肖映雄,余科. 任意多边形骨料混凝土细观模型的建立与数值模拟[J]. 山东大学学报 (工学版), 2025, 55(1): 97-107.
[3]	陈文举, 陈俐企, 包春波, 朱启银, 惠冰, 庄培芝. 循环管道加热桥面融雪效能数值模拟[J]. 山东大学学报 (工学版), 2024, 54(6): 100-110.
[4]	马川义,冯豪杰,蒋红光,侯天新,姚占勇,杨为民. 吸水土工布对路基湿度控制效果的数值模拟[J]. 山东大学学报 (工学版), 2024, 54(4): 141-149.
[5]	韩超,王彤,陈德文,孙恩赐,李平,吴则祥,周冲,庄培芝. 基于耦合欧拉-拉格朗日方法的砂土中静压桩挤土效应数值模拟[J]. 山东大学学报 (工学版), 2024, 54(2): 143-152.
[6]	王钰鑫,吕思忠,姚望,林春金,张明,李召峰,张健,王衍升. 粉质黏土地层桩侧劈裂注浆参数设计与效果评价[J]. 山东大学学报 (工学版), 2023, 53(6): 70-81.
[7]	张亚平,马唯婧,张宸硕,肖辉,张一鸣. 基于图像识别与CAE仿真技术的输变电塔一体化分析[J]. 山东大学学报 (工学版), 2023, 53(6): 122-130.
[8]	宋洋,罗志恒,张波,张宇,朱敏. 裂隙位置对类岩体短柱单轴压缩破坏形态影响[J]. 山东大学学报 (工学版), 2023, 53(5): 121-131.
[9]	王心泉,王智猛,牛犇,蒋恒,冯春. 8度地震烈度区新民隧道出口处边坡的稳定性[J]. 山东大学学报 (工学版), 2023, 53(3): 23-30.
[10]	孙杰,张宏博,程钰,刘羽,张洪波,刘志鲲. 基于TDA填料的废旧轮胎条带加筋砂土边坡承载特性[J]. 山东大学学报 (工学版), 2023, 53(1): 49-59.
[11]	牛犇,张新伟,周玉,李婧,徐兴全,张一鸣. 基于连续-非连续元降雨工况三维边坡稳定性分析[J]. 山东大学学报 (工学版), 2023, 53(1): 92-99.
[12]	郭鹏宁,刘巍,袁浩,冯硕,王延刚. 基于微元离散模型的螺旋挤压脱水效率分析[J]. 山东大学学报 (工学版), 2023, 53(1): 114-121.
[13]	张一鸣,李赟鹏,李婧,丛俊余. 孔隙裂隙介质多场耦合数值计算进展[J]. 山东大学学报 (工学版), 2022, 52(6): 63-78.
[14]	郑卫琴,许杰,孙杰,武科. 复合地层TBM隧道管片受力特征[J]. 山东大学学报 (工学版), 2022, 52(4): 210-213.
[15]	章清涛,刘晓威,高健,孙玉海,闫庆亮,刘源,王昊. 坡顶荷载作用下废旧轮胎条带加筋边坡承载特性[J]. 山东大学学报 (工学版), 2022, 52(3): 70-79.

多维度评价

Viewed

Full text

Abstract

Cited

Shared

Discussed