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Deformed inverse step rectifying energy dissipation method and stilling basin
The invention discloses a deformed inverse step rectifying energy dissipation method and a stilling basin. A continuous inverse step tail on a bottom plate is adopted instead of the conventional tail body type, and water current is collided with inverse steps hierarchically, so that energy is dissipated hierarchically, water current collision, doping and a fluctuation flow state before drainage are enhanced, and collision energy dissipation is realized; a vertical drop is arranged at a front-end inlet; side walls on both sides are asymmetrically diffused towards a river heart side curved surface, and the edges of each step are arranged in a continuous L or saw-tooth form, thereby forming transverse and longitudinal three-dimensional deformed inverse step structures being lower at the inlets, higher at the outlets, lower on the river heart sides and higher on the near-bank sides, so that a hydraulic jump energy dissipation flow state is formed forcibly in the basin. Meanwhile, water current is fully diffused transversely and is guided towards the river heart side, so that the basis length can be shortened effectively, the energy dissipation rate is increased, the effects of dissipating energy and adjusting the flow speed distribution are achieve, water current discharged out of the basin returns into a groove smoothly, and downstream erosion is relieved. The deformed inverse step rectifying energy dissipation method and the stilling basin are suitable for a water flow state with low water head, large unit width flux (particularly greater than m<2>/s) and low Fr number (particularly Fr number is smaller than 2).
Deformed inverse step rectifying energy dissipation method and stilling basin
The invention discloses a deformed inverse step rectifying energy dissipation method and a stilling basin. A continuous inverse step tail on a bottom plate is adopted instead of the conventional tail body type, and water current is collided with inverse steps hierarchically, so that energy is dissipated hierarchically, water current collision, doping and a fluctuation flow state before drainage are enhanced, and collision energy dissipation is realized; a vertical drop is arranged at a front-end inlet; side walls on both sides are asymmetrically diffused towards a river heart side curved surface, and the edges of each step are arranged in a continuous L or saw-tooth form, thereby forming transverse and longitudinal three-dimensional deformed inverse step structures being lower at the inlets, higher at the outlets, lower on the river heart sides and higher on the near-bank sides, so that a hydraulic jump energy dissipation flow state is formed forcibly in the basin. Meanwhile, water current is fully diffused transversely and is guided towards the river heart side, so that the basis length can be shortened effectively, the energy dissipation rate is increased, the effects of dissipating energy and adjusting the flow speed distribution are achieve, water current discharged out of the basin returns into a groove smoothly, and downstream erosion is relieved. The deformed inverse step rectifying energy dissipation method and the stilling basin are suitable for a water flow state with low water head, large unit width flux (particularly greater than m<2>/s) and low Fr number (particularly Fr number is smaller than 2).
Deformed inverse step rectifying energy dissipation method and stilling basin
WU SHIQIANG (Autor:in) / WANG FANGFANG (Autor:in) / WU XIUFENG (Autor:in) / ZHOU JIE (Autor:in) / WANG WEI (Autor:in) / DAI JIANGYU (Autor:in) / XUE WANYUN (Autor:in) / WU YUEJIE (Autor:in) / CHEN HUILING (Autor:in)
15.07.2015
Patent
Elektronische Ressource
Englisch
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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