Study On The Way To Alleviate Waterhammer In Long Distance And High Velocity Of Flow Flat Water Supply Pipe

With the steadily development of economic and continuing raise of population, the water demand in industry, agriculture and daily use have became more and more serious, and the contradiction of water supply and demand are also more outstandingly. However the water supply net and the water pollution and some other reasons make the contradiction more serious.The water shortage has impeded the development of many cities. In order to solve this problem, the central authority and local government put a large number of people, material and money in long distance water supply program. For example Transport Water from South to North, Transport Water from Yellow River to Neimenggu, Transport Water from Yellow River to Qingdao, Transport Water from Yellow River to Shanxi. In the long distance water supply pipe construction project, the most outstanding problem is how to protect the pipe.In order to research how to alleviate water-hammer of the long distance water supply pipe more deeply, this thesis based on the senior's research on six kind of air-water two-phase flow and develop in pressure and long distance water supply pipe. use "Study on the Way to Alleviate Water-hammer in Long Distance and high Velocity of Flow Flat water supply pipe" as the paper topic. Then give a deeper analysis about the structure and capability of the equipments which is common use used on water supply pipe. and discuss the what equipments is demanded in order to alleviate water-hammer in long distance water supply program. Together with the project such as Pinggang water supply pipe project in Zhuhai,Water supply pipe for Kangping power plant project,Dahuifang water supply pipe to Dalian project. Some suggestions are given to alleviate water-hammer in long distance pressure water supply pipe. This thesis can give some useful information on selecting the equipment to alleviate water-hammer in long distance water supply project.Method of characteristics which is widely used in hydraulic transient's analysis is described, The capacity of equipment to alleviate waterhammer is considered in using "Method of characteristics". It's important to distinguish the capacity difference of the equipment for the project designer. For example, there is different gas vent valve, and there are different boundary conditions.According to the character of water hammer in long distance flat water supply pipe, The hazard of air pocket motive was analyses. And the best way to alleviate the water hammer of cavity collapsing were proposed, that was a greatly help to made alleviate water hammer scheme in Dahuofang water supply pipe to Dalian, and it can be chosen to similar project.