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The Research and Protection on Water Hammer

Author: TangYin
Tutor: ZhuLei
School: Wuhan University of Science and Technology
Course: Municipal Engineering
Keywords: Long distance water Water hammer protection Gas-liquid two-phase flow Valve control Simulation analysis
CLC: TU991.39
Type: Master's thesis
Year: 2008
Downloads: 299
Quote: 2
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Abstract

Due to the rapid development of China 's industry , speed up the improvement of living standards of the people and the process of urbanization , the city's water demand increased rapidly , the nearest water can not meet the needs of the people's life and production . In order to meet the water demand , more and more inter-basin water transfer , long-distance water conveyance project . Water pipelines often also affected by a variety of factors , will appear in the ups and downs of a complex change significantly , it is likely to cause water hammer accident . Local position in the pipeline when the water conveyance system for water hammer accident due to the impact of the water hammer buck and suction gas release , vaporization of the liquid , even column separation phenomenon ; may cause water hammer boost liters Cavities Collapsing of high pressure water hammer , these phenomena will make the entire system can not be safely run . Therefore, the correct analysis of the distribution system to water hammer , an accurate prediction of its transition process , reasonable choice of protective measures is to optimize engineering design ensure project safety operation of the key ; protect the living and production water and socio-economic the development has a very important significance . This paper describes the basic principles and methods of the pumping station hydraulic transition process ; combined with the actual pumping stations , water hammer in the same model pumps in parallel boundary conditions mathematical model , and then use the computer software simulation . Through a combination of loose both water engineering accidents Water hammer analysis, the two-stage slow closing valve optimal operating procedures . This procedure protective accident when the pump stops , the pressure increases, the reverse of the unit , pipeline backflow effect is obvious ; also raised the pipe negative pressure exceeds a certain value set intake and exhaust valves , prevent piping partial raised at water column separation . This article studies have shown that long pipeline pumping station , pumping accidents protection against water hammer analysis and calculation according to the boundary conditions , and combined with the pipeline layout , take appropriate protective measures , such as the combination of the two-stage shut-off valve , one-way surge tank , into the exhaust valve and other protective measures in order to play a protective effect of water hammer . Also for Reducing complex pipeline water hammer problem described , and finally the pumping station water hammer analysis for further study .

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CLC: > Industrial Technology > Building Science > Municipal Engineering > Water supply project ( on the Water Works ) > Water distribution > Water hammer
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