Water Science and Engineering 2020, 13(3) 233-242 DOI:   https://doi.org/10.1016/j.wse.2020.09.001  ISSN: 1674-2370 CN: 32-1785/TV

Current Issue | Archive | Search                                                            [Print]   [Close]
Information and Service
This Article
Supporting info
PDF(3299KB)
Reference
Service and feedback
Email this article to a colleague
Add to Bookshelf
Add to Citation Manager
Cite This Article
Email Alert
Keywords
Deep tunnel drainage system
Baffle dropshaft
CFD
Experiments
3D
Two-phase flow field
Authors
PubMed

Influence of flow rate and baffle spacing on hydraulic characteristics of a novel baffle dropshaft  

Xi-chen Wang a, b, Jian Zhang a, *, Zong-fu Fu a, Hui Xu a, Ting-yu Xu a, Chen-lu Zhou a, b

a College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
b The Eastern Route of South-to-North Water Diversion Project Jiangsu Water Source Co., Ltd., Nanjing 210019, China

Abstract

Due to limited flow capacity and the instability of the asymmetric structure of traditional baffle dropshafts, a novel baffle dropshaft with a symmetric structure, adopting the construction shield well directly, is proposed for large-range flow discharge in deep tunnel drainage systems. In this study, a two-phase flow field of the novel baffle dropshaft with three different baffle spacings was simulated at seven different flow rates with a three-dimensional (3D) numerical model verified with experiments, to study hydraulic characteristics of this novel baffle dropshaft. The results show that the novel baffle dropshaft has a remarkable energy dissipation effect. Baffle spacing of the novel baffle dropshaft has a greater effect on flow patterns and baffle pressure distributions than the comprehensive energy dissipation rate. Flow rate is a critical issue for the selection of baffle spacing in the design. Some guidance on baffle spacing selection and structure optimization for the application of this novel baffle dropshaft in deep tunnel drainage systems is proposed. 

Keywords Deep tunnel drainage system   Baffle dropshaft   CFD   Experiments   3D   Two-phase flow field  
Received 2019-09-20 Revised 2020-04-08 Online: 2020-09-30 
DOI: https://doi.org/10.1016/j.wse.2020.09.001
Fund:

This work was supported by the National Natural Science Foundation of China (Grants No. 51709087 and No. 51839008) and the Fifth “333 Project” of Jiangsu Province (Grant No. BRA2018061).

Corresponding Authors: Jian Zhang
Email: jzhang@hhu.edu.cn
About author:

References:

Ding, L.Q., Wang, H., Li, N., Cheng, X.T., 2016. Evolution of deep stormwater storage tunnel projects in the United States and its reference value to China. China Water & Wastewater, 32(10), 35-41 (in Chinese).

Hassani, A.N., Katibeh, H., Farhadian, H., 2015. Numerical analysis of steady-state groundwater inflow into Tabriz line 2 metro tunnel, northwestern Iran, with special consideration of model dimensions. Bulletin of Engineering Geology & the Environment, 75(4), 1-11. https://doi.org/10.1007/s10064-015-0802-1.

He, Z., Wang, B., Yang, Y., Pan, W., Qu, H., 2017. Review on vertical shaft in urban waste water drainage system. China Water & Wastewater, 33(10), 49-53 (in Chinese).

Hu, L., Dai, X.H., Tang, J.G., 2018. Analysis of key technical problems of deep drainage tunnel system. China Water & Wastewater, 34(8), 17-21 (in Chinese).

Lyons, T.C., Odgaard, A.J., 2010. Hydraulic Model Studies for the Regional Municipality of York Southeast Collector Drop Structures. IIHR LDR Report No. 365, University of Iowa, Iowa City.

Lyons, T.C., Odgaard, A.J., Craig, A.J., 2011. Baffle Drop structure Design and Hydraulic Model Studies for the City of Indianapolis Fall Creek/White River Tunnel System. IIHR LDR Report No. 372. University of Iowa, Iowa City.

Ma,Y.L., Wang, H.Y., Fu. Z.F., Xu., H., Chen, Y.L., 2020. Numerical simulation of discharge characteristics of inside wet outside dry baffle-dropshaft. Water Resources and Power, 38(1), 108-111 (in Chinese).

Margevicius, A., Schreiber, A., Switalski, R., Lyons, T.C., Benton, S., Glovick, S., 2010. A baffling solution to a complex problem involving sewage drop structures. In: Proceedings of the Water Environment Federation. Water Environment Federation, pp. 1-9. https://doi.org/10.2175/193864710798216279.

Margevicius, A., Lyons, T., 2012. A comparison of air flow in four types of sewage drop structures. Proceedings of the Water Environment Federation, 2012(3), 318-334. https://doi.org/10.2175/193864712811700688.

Men, X., Li, D., Zhang, J., 2015. Construction status and inspirations of deep tunnel drainage system both at home and abroad. Hebei Journal of Industrial Science & Technology, 32(5), 438-442 (in Chinese). https://doi.org/10.7535/hbgykj.2015yx05013.

Odgaard, A.J., Lyons, T.C., Craig, A.J., 2013. Baffle-drop structure design relationships. Journal of Hydraulic Engineering, 139(9), 995-1002. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000761.

Rubinato, M., Nichols, A., Peng, Y., Zhang, J.M., Lashford, C., Cai, Y.P., Lin, P.Z., Tait, S, 2019. Urban and river flooding: Comparison of flood risk management approaches in the UK and China and an assessment of future knowledge needs. Water Science and Engineering, 12(4), 274-283. https://doi.org/10.1016/j.wse.2019.12.004.

Stirrup, M., Margevicius, T., Hrkac, T., Baca, A., 2012. A baffling solution to sewage conveyance in York Region, Ontario. In: Proceedings of the Water Environment Federation. 2012(4), 74-90. https://doi.org/10.2175/193864712811699852.

Wang, B., Deng, J.Q., He, Z.J., Wang, J.P., 2015a. Experimental study for optimization of baffle-drop shaft-structure. In: The 27th National Conference on Hydrodynamics. China Ocean Press, Nanjing, pp. 455-461 (in Chinese).

Wang, B., Deng, J.Q., He, Z.J., Wang, J.P., 2015b. A study on design constraints for baffle-drop shaft structure. Journal of China Institute of Water Resources and Hydropower Research, 13(5), 363-367 (in Chinese). https://doi.org/ 10.13244/j.cnki.jiwhr.2015.05.008.

Wang, Z.G., Zhang, D., Zhang, H.W., Zhang, R., 2015c. Functions of baffles in baffle-drop shaft. Journal of China Institute of Water Resources and Hydropower Research, 13(4), 270-276 (in Chinese). https://doi.org/10.13244/j.cnki.jiwhr.2015.04.005.

Wang, Z.G., Zhang, D., Zhang, H.W., 2015d. Study on hydraulic transition characteristics of baffle-drop shaft. Water Resources and Hydropower Engineering, 46(12), 44-47 (in Chinese). https://doi.org/10.13928/j.cnki.wrahe.2015.12.011.

Similar articles
1.Reza BARATI, Sajjad RAHIMI, Gholam Hossein AKBARI.Analysis of dynamic wave model for flood routing in natural rivers[J]. Water Science and Engineering, 2012,5(3): 243-258
2.Helena M. RAMOS M.RAMOS Alexandre BORGA Mariana SIM?O.New design solutions for low-power energy production in water pipe systems[J]. Water Science and Engineering, 2009,2(4): 69-84
3.Hai-min WU; Yi-ming SHU; Jun-gao ZHU.Implementation and verification of interface constitutive model in FLAC3D[J]. Water Science and Engineering, 2011,4(3): 305-316
4. Mohammad Mohsin, Deo Raj Kaushal.3D CFD validation of invert trap efficiency for sewer solid management using VOF model[J]. Water Science and Engineering, 2016,9(2): 106-114
5.Peng Dai , Ji-sheng Zhang , Jin-hai Zheng , Kees Hulsbergen , Gijs van Banning .Numerical study of hydrodynamic mechanism of dynamic tidal power[J]. Water Science and Engineering, 2018,11(3): 220-228

Copyright by Water Science and Engineering