Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pressure sudden expansion and sudden fall circular jet flow energy dissipater
The invention discloses a pressure sudden expansion and sudden fall circular jet flow energy dissipater, which comprises a first transition section, a rectangular sluice chamber section and a stilling pool which are jointed with a pressure flood discharging tunnel, and is structurally characterized by comprising a second transition section and an equal hole diameter circular pipe section; the first transition section, the rectangular sluice chamber section, the second transition section, the equal hole diameter circular pipe section and the stilling pool are jointed and connected in sequence; the hole diameter of the equal hole diameter circular pipe section meets the inequation that 0.2B is smaller than d and d is smaller than 0.9B, wherein d is the hole diameter of the equal hole diameter circular pipe section, and B is the minimum width of the bottom of the stilling pool; the backward step height S after the equal hole diameter circular pipe section is jointed with the stilling pool meets the inequation that 0.6d is smaller than S and S is smaller than 3.3d; the relationship between the backward step height S and the downstream water depth ht of the stilling pool is that 2 is smaller than ht/S and ht/S is smaller than 5. The maximum bottom flow speed of the stilling pool can be reduced by more than 50% in comparison with the rectangular outlet, the air entrainment concentration can be greatly improved, and the possibility that flow is subjected to cavitation and cavitation erosion can be effectively reduced.
Pressure sudden expansion and sudden fall circular jet flow energy dissipater
The invention discloses a pressure sudden expansion and sudden fall circular jet flow energy dissipater, which comprises a first transition section, a rectangular sluice chamber section and a stilling pool which are jointed with a pressure flood discharging tunnel, and is structurally characterized by comprising a second transition section and an equal hole diameter circular pipe section; the first transition section, the rectangular sluice chamber section, the second transition section, the equal hole diameter circular pipe section and the stilling pool are jointed and connected in sequence; the hole diameter of the equal hole diameter circular pipe section meets the inequation that 0.2B is smaller than d and d is smaller than 0.9B, wherein d is the hole diameter of the equal hole diameter circular pipe section, and B is the minimum width of the bottom of the stilling pool; the backward step height S after the equal hole diameter circular pipe section is jointed with the stilling pool meets the inequation that 0.6d is smaller than S and S is smaller than 3.3d; the relationship between the backward step height S and the downstream water depth ht of the stilling pool is that 2 is smaller than ht/S and ht/S is smaller than 5. The maximum bottom flow speed of the stilling pool can be reduced by more than 50% in comparison with the rectangular outlet, the air entrainment concentration can be greatly improved, and the possibility that flow is subjected to cavitation and cavitation erosion can be effectively reduced.
Pressure sudden expansion and sudden fall circular jet flow energy dissipater
ZHANG JIANMIN (Autor:in) / LIU YAOLAI (Autor:in) / PENG YONG (Autor:in) / ZHOU HONGBO (Autor:in) / XU WEILIN (Autor:in) / ZHANG YONGTAO (Autor:in) / LI JUNNING (Autor:in) / PAN JIANGYANG (Autor:in)
06.05.2015
Patent
Elektronische Ressource
Englisch
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
Sudden-Enlargement Energy Dissipater for Mica Dam
| ASCE | 2021