Experimental and Numerical Research on the Operational Characteristics of the Single-Outlet Siphon Drainage System in Public Buildings
For a large-scale public building,the siphon drainage system is beneficial for the safety and operation of the building.However,the traditional siphon drainage system is based on full-pipe flow design and is only appli-cable to specific standards,making it impossible to evaluate the detailed flow characteristics from start-up to the en-tire siphon formation process.Therefore,a full-scale experimental platform for the single-outlet siphon drainage system is proposed to study the flow characteristics of siphon drainage,and a full-scale numerical model of the si-phon drainage system is established to further study the effects of the pipe diameter,drainage volume and pipeline slope on the four elements of hydraulic performance.Experimental results indicate that it can be determined that the siphonic full-pipe flow is completely formed when the air inside the suspension pipe is depleted and the air in-side the riser is less.At this point,if water intake exceeds displacement,the system will continue to operate at full flow.Under the same amount of water,reducing the diameter of the pipe can effectively lower the height of the water level,but also increase the full water level.In pipes with larger diameters,the smaller the slope,the weaker the energy dissipation of the hydraulic transition,and the longer the duration of the hydraulic transition.
Public buildingSingle outletSiphon drainage systemOperating characteristicNumerical simulation
NETL
NSTL
万方数据
