Hydraulic Transition Calculating Mathematical Model And Its Analysis Of Water Hammer Calculation Accuracy Problem

With China’s rapid economic development and with the rapid increase in populationcaused by irrational use of water resources and water pollution, all these make our watersupply and demand becomes extremely sharp and prominent, has seriously hindered thedevelopment of the our city. To solve this problem, government has invested considerablehuman and material resources to build more water supply works. In the water conveyanceproject, the most common and the most prominent problem is the problem of long-distancewater pipeline water hammer protection.Aqueduct in the event of water hammer is a great harm, especially cavities waterhammer occurs, the boost will be ordinary water hammer a few times. Water hammer ishowever difficult to foresee the senses, which is currently the most advanced mathematicalmodeling of computer programming, water pipelines water hammer occurs in the system thelocation and size of the pressure, specifically the pressure generated by the envelope to thejudge, and according to the specific circumstances set water hammer protection facilities.Many hydraulic transient calculation model, the most important distinction is whether thereaction of the drying phenomenon, and calculate the pressure after disconnection occurred.Practice shows cavities water hammer is an objective reality, cannot be ignored. This longdistance pressure water pipe as the research object, according to the three hydraulic transitioncalculating model for hydraulic calculation results are compared. Finally concluded that thereis drying up hydraulic transition model is more realistic and more accurate.This paper summarizes the results of previous studies on the basis of systematicallyexpounded the basic theory of unsteady flow and its calculation method, application methodof characteristics established hydraulic transient computer model, and select a reasonablenumerical methods. Combined with various boundary conditions of water hammer calculationmathematics model is established, the application of computer visualization of water hammerprotection calculation program compiled language, using the computer simulated calculation.Combining with Xin Jiang Fu Kang long distance water conveyance project, thehydraulic transition process in the numerical calculation and theoretical analysis, and the water hammer calculation precision of the problems are analyzed, in looking for a moreprecise calculation of water hammer, but also for the actual engineering design and safeoperation provides a more scientific advice.