Journal of Shandong University(Engineering Science) ›› 2020, Vol. 50 ›› Issue (5): 77-82.doi: 10.6040/j.issn.1672-3961.0.2020.169

Previous Articles    

Numerical simulation of the tangent circular-to-rectangular transition duct

CAO Hongzhen1, QI Jinsheng1, YUAN Baoqiang2, DU Wenjing2, WANG Zhan2*   

  1. 1. Shandong Electric Power Engineering Consulting Institute Corporation, Jinan 250013, Shandong, China;
    2. School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
  • Published:2020-10-19

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

CLC Number: 

  • TB126
[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.
[1] CHEN Yucheng, WANG Zhaoyang, GUO Ming, LIN Peng. Influence of concealed karst cave on surrounding rock stability and its treatment technology [J]. Journal of Shandong University(Engineering Science), 2020, 50(5): 33-43.
[2] QI Jinsheng, CAO Hongzhen, SHI Yan, DU Wenjing, WANG Zhan. Optimization of the inner deflector of the shrimp-waist elbow [J]. Journal of Shandong University(Engineering Science), 2020, 50(5): 64-69.
[3] WANG Chunguo. Mechanical behavior of large-span and small spacing road tunnel with biased pressure [J]. Journal of Shandong University(Engineering Science), 2020, 50(4): 85-89.
[4] Wei HU. Flow resistance characteristics of wire mesh porous media channel based on pore-scale [J]. Journal of Shandong University(Engineering Science), 2019, 49(6): 119-126.
[5] Huilin ZHOU,Yan QIU. Phase change characteristics of paraffin in rectangular storage unit [J]. Journal of Shandong University(Engineering Science), 2019, 49(4): 99-107.
[6] Mingcai LIU. Impact analysis on construction of large section and small spacing road tunnel [J]. Journal of Shandong University(Engineering Science), 2019, 49(4): 78-85.
[7] Yulei ZHANG,Yong WANG,Yudong XIE,Guang SUN,Yanyun WANG,Jiazhen HAN. Numerical simulation on kinetics characteristics of liquid metal MHD generator [J]. Journal of Shandong University(Engineering Science), 2019, 49(1): 101-106.
[8] SONG Guijie. Deformation characteristic and instability analysis for shallow soft rock section during tunnel-entering construction [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2018, 48(2): 53-60.
[9] WANG Danhua, ZHANG Guanmin, LENG Xueli, XU Mengna, HAN Yuanyuan. The numerical simulation of two-phase flow distribution characteristics in T-tube [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2018, 48(1): 89-95.
[10] DONG Zhen, YANG Yonglu, XIONG Guodong, LAI Yanhua, LYU Mingxin. Preparation and optimization of compound bonded material used in reducing the contact thermal resistance [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2017, 47(3): 143-150.
[11] REN Bing, WAN Yi, WANG Guisen, WANG Teng. Influence of different acid-etching time on the surface morphology and corrosion resistance of TC4 titanium alloys after sandblasting [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2017, 47(3): 139-142.
[12] LIAN Lu, HAN Xiangsheng, ZHANG Changqiao, YU Ping, WEI Yunhe. Preparation, characterization and performance of drag reduction agent used in pipeline of brine mining and transportation [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2017, 47(2): 117-122.
[13] XIA Mengran, LI Wei, FENG Xiao, ZHU Guangxuan, LI Xia. Grouting reinforcement and excavation stability on super-shallow buried and water-rich sand stratum subway transverse channel [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2017, 47(2): 47-54.
[14] LYU Guoren, ZHANG Qun, NIU Ben, GAO Quanting, WU Zhaoshou. The effects of pile foundation of high-rise building on adjacent structures [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2017, 47(1): 48-58.
[15] PENG Yuancheng, DONG Xu, LIANG Na, DENG Zhenquan. Model test of the Beipan River's new open-web continuous rigid frame bridge corner node [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2016, 46(6): 113-119.
Full text



No Suggested Reading articles found!