the water hammer phenomenon in hydroelectric power plant’s penstock is one of the famous troubles which have been an interest for researchers. hence this phenomenon can cause many harmful effects on pipe lines and turbine, it is essential that effects of these surges along with line and turbine have been studied and suitable methods for controlling presented. in this way one of the most effecti...

four explicit finite difference schemes, including lax-friedrichs, nessyahu-tadmor, lax-wendroff and lax-wendroff with a nonlinear filter are applied to solve water hammer equations. the schemes solve the equations in a reservoir-pipe-valve with an instantaneous and gradual closure of the valve boundary. the computational results are compared with those of the method of characteristics (moc), a...

An experimental study addressing the challenge to measure relaxation coefficient of very fast phenomena such as water hammers is presented. acrylic projectile containing accelerated and impacts a metal wall creating hammer. State art laser measurements techniques will be deployed in order achieve goal. A compressed air custom built cannon used accelerate create impact leading First results for ...

Abstract Analytical formulas for laminar water hammer in horizontal pipes were extended and simplified into a compact mathematical form based on dimensionless parameters: time, number, etc. Detailed treatment of turbulent analytical solutions is beyond the scope this paper. In Muto Takahashi solution, novel Laplace time domain flow velocity wall shear stress developed. A series comparative stud...