Study of three-dimensional numerical simulation on hydro-brake with baffle
CHENG Wentao1,2, Wu Yanming1,2, LI Chao1,2,3, MA Guangfei1,2, ZHANG Jian3
1.Standard & Quality Control Research Institute, Ministry of Water Resources/Hangzhou Mechanical Design Research Institute, Ministry of Water Resource, Zhejiang, Hangzhou 310024, China; 2.Key Laboratory of Surface Engineering of Equipments for Hydraulic Engineering of Zhejiang Province, Zhejiang, Hangzhou 310024, China; 3.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China
The hydro-brake potentially can be applied to relieve urban waterlogging under a condition without reducing flow-through cross-sectional area. To judge whether it can operate properly in an actual working condition, the performance of a hydro-brake was simulated numerically by using VOF two-phase flow method in CFD. Results show that the experimental curve agrees well with the simulation one, as such the simulation method can reflect the flow characteristics better. The throttling efficiency of hydro-brake is about 18.2% without baffle, but is improved by about 22.7% after a baffle was added. The throttling efficiency of hydro-brake with baffle is generally more than 30.0%, depending on the deflection angle nonlinearly. Specially, if the angle is about 15°, the throttling efficiency can reach as high as 40.9%.
QU Kaixuan. Analysis of urban waterlogging control and drainage network planning [J]. Journal of Chifeng University(natural science edition),2016, 32(5): 63-64.(in Chinese)
LECORNU J P, FARAM M G, JARMAN D S, et al. Physical characterisation and hydrograph response modelling of vortex flow controls[C]//Proceedings of the 11st International Conference on Urban Drainage, 2008.
QUEGUINEUR G, JARMAN D, PATERSON E, et al. Computational fluid dynamics of vortex flow controls at low flow rates[J]. Engineering & computational mechanics, 2013, 166(4):211-221.
HALL R J. Using the Hydro-Brake® to control and attenuate urban stormwater runoff, improve WSUD treatment processes and reduce downstream flooding risk[D]. Queensland: University of The Sunshine Coast,2015.
ANDOH R Y G, FARAM M G, STEPHENSON A G, et al. A novel integrated system for stormwater management[C]//Proceedings of the 4th International Conference on Innovative Technologies in Urban Storm Drainage, 2001: 25-27.
BOAKES G P, STEPHENSON A, LOWES J B, et al. Weedon flood storage scheme-the biggest Hydro-Brake® in the world[C]//Proceedings of the 13th Conference of the British Dam Society and the ICOLD European Club, 2004.
ANDOH R Y G, FARAM M G, OSEI K. Vortex flow controls in integrated stormwater management for urban environments[C]//Proceedings of the 6th International Water Sensitive Urban Design Conference and Hydropolis,2009.
LI Chao,WU Yanming,CHENG Wentao,et al. 3-D numerical simulation on law of influence from structural size of hydro-brake on its external characteristics [J]. Water resources and hydropower engineering,2017,48(6): 80-84.(in Chinese)
ZHANG Lei,WU Yanming,CHENG Wentao,et al. Performance optimization of vortex hydro-brake and experimental study under different working conditions[J]. Water & wastewater engineering, 2017, 43(6): 110-116.(in Chinese)
HARIHARAN C, GOVARDHAN M. Improving performance of an industrial centrifugal blower with parallel wall volutes[J]. Applied thermal engineering, 2016, 109:53-64.