Study on Water Hammer in Centrifugal-Pump Systems (Part 1) : Construction of Graphical Solution

Abstract

Protection of pump motors against water hammer under the condition of power failure is a very important factor in the design of large pumps and long pipe lines, etc. In this report, the author describes the construction of graphical solution and the method of calculation founded on his new scheme in the case of negligible pipe friction and velocity head. The h-q and m-q diagrams are presented for facilitating the calculation of graphical solution. It is shown that these diagrams are easily derivable from ordinary characteristic curves of pumps. An example of the application of the method is given.