Complete Pump Characteristic Curve Analysis And Study On Effects Of That On Small Caliber And Long Distance Flat Transient Pipe Flow

China's forefront of the total water resources in the world, but the per capita share of water resources is only 1/4 of the world average, widespread water shortage in china, and increasing trend. china's South-North Water Resources less, geographical distribution are very different, and as the population growth and continuous development of industrial and agricultural production, causing the growing of the contradiction between supply and demand of water resources. Traditional small area of water have been unable to meet the water demand in some regions. Therefore, you need to build some long-distance water conveyance project to solve water resource allocation problem of uneven.In this kind of long-distance water diversion project, the most common and the most prominent problem is the issue of water conveyance pipeline safety, of pump-stopping water hammer problem is especially highlighted. When through the computer simulation of pump-stopping hydraulic transient and prediction of water hammer pressure and guide the selection of water hammer protection measures and importance of water pump complete characteristics curve of pump operating condition parameters on simulation of water pump of hydraulic transition process has an important influence. However, the present water pump complete characteristics curve of information relatively limited, for calculation of water hammer caused by pump and pump specific speed of pump complete characteristics curve of similar simulation calculation,this will inevitably result error.This article in binchang mining area of a booster pump station water conveyance pipeline and a pipeline of water supply engineering for instance, to use specific speed of 128,80,60, 47,530 of the water pump complete characteristics curve by computer program for pump-stopping water hammer calculation and analysis on protective measures on water hammer calculation of influence.Through this analysis shows that a flat in small diameter long distance pipe water conveyance project, to borrow and use the same type of pump specific speed close to water pump complete characteristics curve calculation of water hammer, results can be used to guide the selection of water hammer protection measures. If you apply specific speed difference between the different types of large water pump complete characteristics curve calculation of water hammer, will be to evaluate a greater impact cannot be used as a water hammer protection measures of selective basis.