虹吸式雨水排水系統(tǒng)單斗排水性能研究
[Abstract]:With the rapid development of urban construction, the number of large space, large capacity and large span buildings continues to increase. Many projects have started to adopt siphon Rain Water drainage system with better drainage performance, but the design and checking method of existing siphon drainage system is based on the condition of full pipe flow. The process of siphon initiation and formation is not well understood. The length of suspension pipe in the existing system is designed according to the roof structure without considering the influence on the siphon drainage performance and there is no restriction on the length of the suspension pipe in the code. In this paper, the dynamic variation of system parameters in siphon forming process and the method of checking the length of suspended pipe in pipeline system are studied. Firstly, the paper analyzes the siphon drainage system theoretically, summarizes the forming conditions and judgment criteria of the siphon drainage system, puts forward the performance index of siphon drainage system, builds a single bucket siphon drainage system experimental platform, The dynamic variation of system parameters under different recharge conditions is studied by indirect measurement method. According to the quantity of water supply (large flow condition: Q 80, middle flow condition: 55 Q 80, small flow condition: 30 Q 55%), the variation of flow state and pipeline parameters is divided into three types. And use the literature test data to verify. Secondly, a numerical model of siphon drainage system is established by using STAR-CCM software. The siphon forming process is simulated under the condition of large flow rate. The variation process of flow state in pipe, the change trend of system parameter curve, and the siphon start-up time are analyzed. The comparison between the maximum displacement and the experimental results proves the accuracy and feasibility of the numerical method, and the sensitivity analysis of the influence factors on the siphon start-up time by selecting the structural parameters of the pipe shows that: the length of the suspended pipe, Four factors, such as riser diameter, suspended pipe diameter and tail tube length, have great influence on the siphon start-up time. This paper puts forward a way to simplify the calculation of siphon start-up time by using upstream pipe volume. Finally, aiming at the problem of long suspension pipe in existing siphon drainage system, a method for checking the length of suspension pipe is put forward. Based on Bernoulli equation, continuity equation and numerical results, the simplified calculation models of suspension pipe length and maximum displacement (Q-L2), suspension pipe length and siphon start-up time (T1-L2) are obtained. These two conclusions are taken as the limiting conditions of the length of the suspended pipe, and the maximum length of the suspended pipe L _ 2 is further synthesized according to the local meteorological conditions, roof structure and gutter size, which provides a reference for the engineering design.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TU823
【參考文獻】
相關期刊論文 前10條
1 廖浩波;;重慶江北國際機場T3A航站樓虹吸式屋面雨水排水系統(tǒng)的應用[J];給水排水;2016年S1期
2 楊柳;侯立強;李紅蓮;許馨尹;劉加平;;空調辦公建筑能耗預測回歸模型[J];西安建筑科技大學學報(自然科學版);2015年05期
3 陳良波;鄭亞青;;基于最小二乘法的曲線擬合研究[J];無錫職業(yè)技術學院學報;2012年05期
4 潘俊杰;何蓉;;壓力流虹吸式屋面雨水排水系統(tǒng)的設計與應用探討[J];中國給水排水;2011年14期
5 熊曦;歸談純;;虹吸式屋面雨水排水系統(tǒng)沿程水頭損失計算探討[J];給水排水;2010年07期
6 丁淳;;壓力流(虹吸式)屋面雨水排水系統(tǒng)設計問題探討[J];給水排水;2010年02期
7 杜娟;;利用三維VOF模型模擬消能池的淹沒水躍[J];中國科技信息;2008年02期
8 陳小銀;王文海;林增玉;;雨水斗排水過程的數值模擬[J];給水排水;2007年S1期
9 朱建榮;徐鳳;;屋面雨水排水量計算參數取值探討[J];給水排水;2006年11期
10 歸談純;;虹吸式屋面雨水排水系統(tǒng)熱點問題探討[J];中國給水排水;2006年04期
相關會議論文 前1條
1 呂暉;劉彥菁;姜文源;;虹吸式屋面雨水排水系統(tǒng)事故原因分析[A];中國工程建設標準化協會建筑給水排水專業(yè)委員會、中國土木工程學會水工業(yè)分會建筑給水排水委員會2015年學術交流年會論文集[C];2015年
相關博士學位論文 前1條
1 彭志威;基于計算流體力學的虹吸式流道形狀優(yōu)化設計[D];湖南大學;2009年
相關碩士學位論文 前5條
1 程陽;虹吸式屋面雨水排水系統(tǒng)雨水斗的模擬研究[D];南華大學;2015年
2 潘浩;虹吸式屋面雨水排水系統(tǒng)設計中天溝工況實驗研究與模擬[D];南華大學;2012年
3 陳中濤;虹吸式屋面雨水排水系統(tǒng)水力研究[D];浙江大學;2007年
4 張展銘;虹吸式屋面雨水排水系統(tǒng)研究[D];浙江大學;2006年
5 艾海峰;三維水流數值模擬及其在水利工程中的應用[D];天津大學;2006年
,本文編號:2146468
本文鏈接:http://www.sikaile.net/jianzhugongchenglunwen/2146468.html