LIXue-liang,GUITan-chun,LILi-ping.Impact of Rainwater Riser Energy Dissipation Solutions on 87-type Roof Outlet Rainwater System in Super High-rise Building[J].China Water & Wastewater,2024,40(5):116-121.
Impact of Rainwater Riser Energy Dissipation Solutions on 87-type Roof Outlet Rainwater System in Super High-rise Building
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第5期
Page:
116-121
Column:
Date of publication:
2024-03-01
- Keywords:
- super high-rise building; 87-type roof outlet rainwater system; energy dissipation measure; hydraulic regime; numerical simulation
- Abstract:
- In super high-rise buildings, the 87-type roof outlet rainwater system is generally adopted on the roof, and conventional energy dissipation measures such as π-shaped bend, horizontal pipe turning and riser diameter expansion are set for the rainwater riser to achieve decompression and energy dissipation. This paper investigated the changes of indexes such as water-air ratio, flow rate, hydrodynamic pressure and velocity head of the riser system with conventional energy dissipation measures though numerical simulation technology, so as to analyze its actual energy dissipation performance and possible problems. The simulation results of the platform with height of 100 meters showed that compared with the system without energy dissipation measures, the system with π-shaped bend and horizontal pipe turning could not reduce pressure and energy dissipation, but increased the flow rate and pressure fluctuation peak. In the system with riser diameter expansion, the peak velocity decreased slightly, but its performance in terms of dynamic water pressure was not as good as that of the system without energy dissipation measures.
Last Update:
2024-03-01