Water Hammer in Hydraulic Pipe Lines

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Excerpt from Water Hammer in Hydraulic Pipe Lines: Being a Theoretical and Experimental Investigation of the Rise or Fall in Pressure in a Pipe Line, Caused by the Gradual or Sudden Closing or Opening of a Valve, With a Chapter on the Speed Regulation of Hydraulic Turbines Although the study of Hydraulics has been very much to the fore during recent years, one particular branch of the subject - viz., that dealing with the problems involved during the acceleration or retardation of a water column, would seem to have been almost entirely neglected. In fact, except for an experimental investigation by Joukowsky, of which we have no English translation, and which only deals with sudden stoppage of flow, we have no available literature dealing with the matter. In the majority of text-books on Hydraulics the treatment which the question receives is not only of the scantiest but is as inaccurate as scanty, and as the whole subject is most interesting and is certainly not without practical importance, perhaps it is unnecessary to apologise for the following account of a theoretical and experimental investigation carried out by the author. The experimental portion of the work was done in the Engineering Laboratories of the Manchester University, and the thanks of the author are due to the University authorities for their ready acquiescence in this publication of the work, and to Mr. J. Hall of the Engineering Staff for much help in the preparation of the apparatus and in carrying out the experiments. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.