Local scour by multiple slit-type energy dissipaters
Tóm tắt
Energy dissipation and scour control are all the key issues for the design of hydraulic structures. On the basis of the high energy dissipation for the multiple slit-type energy dissipaters (M-STED) developed by the authors, in this work, the characteristics of the scour hole for the M-STED were experimentally investigated through three sets of those physical models with five cases and a scour hole form index was proposed. The results show that, the M-STED results in not only the high energy dissipation but also the mild upstream slope of the scour hole thanks to the scour hole form index of larger than 0.5, which is in favor of the safety of the release works.
Tài liệu tham khảo
Wu J. H., Li S. F., Ma F. Energy dissipation of slot-type flip buckets [J]. Journal of Hydrodynamics, 2018, 30(2): 365–368.
Tian R., Wu J. H., Xu Z. et al. Jet trajectory of flow-separating slot-type flip bucket [J]. Water Supply, 2020, 20(1): 65–72.
Deng J., Wei W. R., Tian Z. et al. Analysis of pressure differences and water transverse movement in a partial-flip bucket [J]. Journal of Hydraulic Engineering, ASCE, 2020, 146(9): 04020063.
Deng J., Yang Z. L., Tian Z. et al. A new type of leak-floor flip bucket [J]. Science China Technology Science, 2016, 59(4): 565–572.
Lucas J., Hager W. H., Boes F. M. Deflector effect on chute flow [J]. Journal of Hydraulic Engineering, ASCE, 2013, 139(4): 444–449.
Pfister M., Hager W. H. Deflector-jets affected by pre-aerated approach flow [J]. Journal of Hydraulic Research, 2012, 50(2): 181–191.
Wei W. R. Experimental study on hydraulic characteristics of X-shape flaring gate pier and deflecting stilling basin united energy dissipater [J]. Applied Mechanics and Materials, 2013, 376: 279–283.
Wu J. H., Ma F., Yao L. Hydraulic characteristics of slit-type energy dissipaters [J]. Journal of Hydrodynamics, 2012, 24(6): 883–887.
Lian J. J., He J. L., Gou W. J. et al. Effects of bucket type and angle on downstream nappe wind caused by a turbulent jet [J]. International Journal of Environmental Research and Public Health, 2019, 16(8): 1360.
Huai W. X., Wang Z. W., Qian Z. D. et al. Numerical simulation of sandy bed erosion by 2D vertical jet [J]. Science China Technological Sciences, 2011, 54(12): 3265–3274.
Huang Q. J., Wu J. H. Research on contraction energy dissipaters [J]. Journal of Hohai University (Natural Sciences), 2008, 36(2): 219–223 (in Chinese).
Wu J. H., Yao L., Ma F. Hydraulics of a multiple slit-type energy dissipaters [J]. Journal of Hydrodynamics, 2014, 26(1): 86–93.
Ministry of Water Resources of the People’s Republic of China. Specification for normal hydraulic model test SL 155-2012 [S]. Beijing, China: China Water and Power Press, 2012 (in Chinese).