Numerical simulations and experimental studies on hydraulic characteristics of new shape rough strips
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Abstract:
The traditional energy dissipation and diversion measures of the curved spillway are mostly applicable to the curves with a smaller breadthdepth ratio (e.g.,the ratio of spillway breadth to average water depth),however,the problems of energy dissipation and diversion for the curved spillway with larges breadthdepth ratio have been reported in the literature.The new type of rough strips energy dissipator was proposed in this study based on the general engineering measures to solve the transverse circulation in curved spillway and combination with 635 Spillway Regulation Project in Xinjiang..In order to further explore the hydraulic characteristics and the diversion mechanism of the roughstrips,numerical simulations and experimental studies were used in this study,i.e.,numerical simulation on the seven working conditions of the bending based on the RNG k-εturbulence model.The results showed that the new type of rough strips had the advantages over the traditional auxiliary energy dissipator,which is not applicable to energy dissipation and the curved spillway with larges width to depth ratio.The flow patterns of water surface was also superior to that of traditional energy dissipator,while solving the circulation current in river bend, reducing the transverse slope of water surface and shortening the distance of downstream adjustment section.
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