公共建筑单出口虹吸排水系统运行特性试验与数值研究  

Experimental and Numerical Research on the Operational Characteristics of the Single-Outlet Siphon Drainage System in Public Buildings

作　　者：温志芳[1] WEN Zhifang(Hunan City University Design and Research Institute Co.,Ltd.,Changsha,Hunan Province,410000 China)

机构地区：[1]湖南城市学院设计研究院有限公司,湖南长沙410000

出　　处：《科技资讯》2024年第12期143-146,157,共5页Science & Technology Information

摘　　要：虹吸排水系统有利于大型公共建筑的安全运行。然而,传统的虹吸排水系统基于全管流量设计,仅适用于特定标准,无法评估从启动到整个虹吸形成过程的详细流量特性。因此,提出全尺寸的单出口虹吸排水系统实验平台,以研究虹吸排水的流动特性。并建立虹吸排水系统的全尺寸数值模型,进一步研究管道直径、排水量和管道坡度对水力性能4个要素的影响。实验结果表明:当悬浮管内的空气耗尽,立管内的空气较小时,可以确定虹吸满管流完全形成。此时,如果取水量大于排量,则系统继续以全流量状态运行。在相同水量下,减小管道直径可以有效降低水位高度,但同时也会增加满水程度。在直径较大的管道中,坡度越小,水力跃迁的能量耗散越弱,水力跃迁的持续时间越长。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.

关 键 词：公共建筑 单出口虹吸 排水系统 运行特性 数值模拟 

分 类 号：TU823[建筑科学]