Numerical Simulation of Heat Transfer and Fluid Flow of ThermalHydrolyzed Sewage Sludge in Twisted Oval Tube

doi:10.11908/j.issn.0253-374x.2017.01.010

Home > Archive>Volume 45, Issue 01, 2017 >64-70. DOI:10.11908/j.issn.0253-374x.2017.01.010

Numerical Simulation of Heat Transfer and Fluid Flow of ThermalHydrolyzed Sewage Sludge in Twisted Oval Tube
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                        10.11908/j.issn.0253-374x.2017.01.010
                    
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                        WU ZhigenWU Zhigen
State Key Laboratory of Pollution Control and Resources Reuse Research, Tongji University, Shanghai 200092, China
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WU ChangchunWU Changchun
State Key Laboratory of Pollution Control and Resources Reuse Research, Tongji University, Shanghai 200092, China
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ZHANG JingsiZHANG Jingsi
State Key Laboratory of Pollution Control and Resources Reuse Research, Tongji University, Shanghai 200092, China
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LI ZhuoLI Zhuo
State Key Laboratory of Pollution Control and Resources Reuse Research, Tongji University, Shanghai 200092, China
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Abstract:

The flow and heat transfer performances of thermalhydrolyzed sewage sludge in twisted oval tubes were numerically investigated and the mechanism of enhanced heat transfer was analyzed in this paper. The velocity and temperature distributions at different aspect ratios and twist ratios were obtained, and the effect of Reynolds number on the flow and heat transfer was clarified. The results reveal that the heat transfer efficiency could be greatly increased by the generation of vortex and secondary flow but with the growth of pressure drop. Furthermore, a larger twist ratio leads to a smaller thermal performance factor, and as the aspect ratio increases to 1.96, the thermal performance factor reaches the maximum value and then descends. By compared with the results of smooth round tubes, the twisted oval tubes show much improved heat transfer efficiency at a low Reynolds number(<5 000).

Key words:thermal hydrolyzed sewage sludge; numerical simulation; twisted oval tubes; enhanced heat transfer

Reference

戴晓虎. 我国城镇污泥处理处置现状及思考[J]. 给水排水, 2012, 38(2): 1-5.

DAI Xiaohu. The current situation and thinking of urban sewage sludge treatment and disposal in China[J]. Water Wastewater Engineering, 2012, 38(2): 1-5.

吴静, 王广启, 曹知平, 等.“热水解-高温厌氧消化”工艺处理高含固率剩余污泥的中试研究[J]. 环境科学, 2014, 35(9), 3461-3465.

_{WU Jing, WANG Guangqi,CAO Zhiping,}_{et al}_. _Pilot_s_{tudy of}_t_hermal_t_reatment/_t_hermophi_lic_a_naerobic_d_igestion_p_rocess_t_reating_w_aste_a_ctivated_s_{ludge of}_h_igh_s_olid_c_ontent_{[J].Environment Science,}_{2014, 35(9), 3461-3465.}

张杏祥, 桑芝富. 螺旋扭扁管强化传热与阻力性能的模拟分析[J]. 化工机械, 2006, 33(1): 24-29.

ZHANG Xingxiang, SANG Zhifu. Simulation and analysis of the enhanced heat transfer and flow friction property of the spiral twisted tubes[J]. Chemical Engineering Machinery, 2006, 33(1): 24-29.

张杏祥, 桑芝富. 扭曲扁管管内流动与传热的三维数值研究[J]. 南京工业大学学报(自然科学版), 2005, 27(4): 71-75.

ZHANG Xingxiang, SANG Zhifu. Three dimension numerical research on flow and heat transfer characteristics in twisted oval tube[J]. Journal of Nanjing University of Technology(Nature Science edition), 2005, 27(4): 71-75.

张杏祥, 魏国红, 桑芝富. 螺旋扭曲扁管换热器传热与流阻性能试验研究[J]. 化学工程, 2007, 35(2): 17-25.

ZHANG Xingxiang, WEI Guohong, SANG Zhifu. Experimental research of heat transfer and flow friction properties in twisted tube heat exchanger[J]. Chemical Engineering, 2007, 35(2): 17-25.

朱冬生, 郭新超, 刘庆亮. 扭曲管管内传热及流动特性数值模拟[J]. 流体机械, 2012, 40(2): 63-67.

ZHU Dongsheng, GUO Xinchao, LIU Qingliang. Heat Transfer Performance and Flow Resistance of Twisted Tubes in the Tube Side[J]. Fluid Machinery, 2012, 40(2): 63-67.

高学农, 邹华春, 王端阳, 等. 高扭曲比螺旋扁管的管内传热及流阻性能[J]. 华南理工大学学报(自然科学版), 2008, 36(11): 17-21.

GAO Xuenong. ZOU Huachun, WANG Ruiyang, et al. Heat transfer and flow resistance properties in twisted oblate tube with large twisted ratio[J]. Journal of South China University of Technology(Nature Science Edition), 2008, 36(11): 17-21.

杨蕾, 朱冬生, 曾力丁, 等. 扭曲管传热性能数值模拟与实验研究[J]. 化学工程, 2010,38(1): 26-29.

_{YANG Lei, ZHU Dongsheng, ZENG Dingli,}_{et al}_. _{Numerical si}_m_ulatio_n_a_n_d_{experimental researc}_h_on_{heat transfe}_r_performanc_e_o_f_twiste_d_tub_e_{[J]. Chemical Engineering,}_{2010,38(1): 26-29.}

于洋, 朱冬生, 曾力丁, 等. 扭曲管强化传热性能实验研究[J]. 化学工程, 2011, 39(2): 18-21.

YU Yang, ZHU Dongsheng, ZENG Dingli, et al. Experimental investigation on heat transfer enhancement of twisted tube[J]. Chemical Engineering, 2011, 39(2): 18-21.

孟继安, 李志信, 过增元, 等. 螺旋扭曲椭圆管层流换热与流阻特性模拟分析[J]. 工程热物理学报,2002, 23(Z1): 117-120.

MENG Jian, LI Zhixin, GUO Zengyuan,et al. Simulation and analysis on laminar flow and heat transfer in twisted ellipse-tube[J]. JOURNAL OF ENGIEENRING THERMOPHSYICS, 2002, 23(Supplement): 117-120

Bishara. F, Jog. M.A, Manglik. R.M. Computational simulation of swirl enhanced flow and heat transfer in a twisted oval tube[J]. Journal of Heat Transfer, 2009, 131(8): 1.

Bishara. F, Jog. M.A, Manglik. R.M. Heat transfer and pressure drop of periodically fully developed swirling laminar flows in twisted tubes with elliptical cross sections[J]. IMECE2009, Proceedings of the 2009 ASME IMECE, 2009,9:1131-1137.

Bishara. F. Numerical simulation of fully developed laminar flow and heat transfer in isothermal helically twisted tubes with elliptical cross-section[M]. University of Cincinnati,Cincinnati,2010,45-56.

Tan. X. H, Zhu. D. S, Zhou. G. Y, et al. Experimental and numerical study of convective heat transfer and fluid flow in twisted oval tubes[J]. International Journal of Heat and Mass Transfer, 2012, 55: 4701-4710.

Tan. X. H, Zhu. D. S, Zhou. G. Y, et al. Heat transfer and pressure drop performance of twisted oval tube heat exchanger[J]. Applied thermal engineering, 2013, 50(1): 374-383.

S. Yang, L. Zhang, H. Xu. Experimental study on convective heat transfer and flow resistance characteristics of water flow in twisted elliptical tubes[J]. Applied thermal engineering, 2011, 31(14-15): 2981-2991.

张涛, 朱晓军, 彭飞, 等. 近壁面处理对湍流数值计算的影响分析[J]. 海军工程大学学报, 2015, 25(6): 104-108.

ZHANG Tao, ZHU Xiaojun, PENG Fei, et al. Analysis of effect of near-wall treatment on numerical computation turbulent flow[J]. Journal of Naval University of Engineering, 2015, 25(6): 104-108.

周志军, 林震, 周俊虎, 等. 不同湍流模型在管道流动阻力计算中的应用和比较[J]. 热力发电,2007,36(1):18-23.

ZHOU Zhijun, LIN Zhen, ZHOU Junhu,et al. Application of different turbulent models in calculation of flow resistance in pipelines and comparison thereof[J]. Thermal Power Generation, 2007,36(1):18-23.

Spalart P R, Allmaras S R. A one-equation turbulence model for aerodynamic flows[J]. La Recherche Aerospatiale, 1994, (1): 5-21.

陶文铨. 数值传热学[M].第二版.西安: 西安交通大学出版社, 2001:203-218.

TAO Wenquan. Numerical heat transfer[ M]. 2_nd ed. Xi'an: Xi'an Jiao Tong University press, 2001: 203-218.

Webb R L, Eckert E R G. Application of rough surfaces to heat exchanger design[J]. International Journal of Heat Mass Transfer,1972, 15(9): 1647-1658.

Webb R L. Performance evaluation criteria for use of enhanced heat exchanger surfaces in heat exchanger design[J]. Int. J. Heat Mass Transfer, 1981, 24(4): 715-726.

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WU Zhigen, WU Changchun, ZHANG Jingsi, LI Zhuo. Numerical Simulation of Heat Transfer and Fluid Flow of ThermalHydrolyzed Sewage Sludge in Twisted Oval Tube[J].同济大学学报(自然科学版),2017,45(01):64~70

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Received:April 22,2016
Revised:November 18,2016
Adopted:September 05,2016
Online: February 10,2017
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