Research On Dynamic Characteristic Of Valve And Noise Control In Seawater Pipe

The fluid pressure pulse in seawater piping system can cause Flow-noise that badly affect the environment and worker in health, even lead to deterioration in operation security of piping system . Therefore, this paper studies three kindsvalves such like bufferfly valve, brake valve and ball valve, with the numerical simulation method by CFX which is often used to simulate the fluid. By the simulation of three kinds of valves, we can kown dynamic characteristic of them. In this paper, I not only simulate for three kinds of valves, but also analyse cause of flow-noise and give respectively mathematical model of main noise sources in piping system such as pupm and valve. And concerning boundary conditions along piping system are properly set. Futhermore, vertex sound is discussed in this paper. Effect of the noise reduction about the mufflers is analysed, and a lot of trials is used to testify exist of valve noise and influence to pipe system.There kinds of mufflers are proved that they can reduce the fluid niose of pipe system by a large number of experimentation.