While tests were being carried out on the motion which follows sudden closure of a valve at the beginning of a pipe, certain irregularities of the ensuing wave trains were noticed. Such irregularities were brought out all the more clearly because a sensitive electronic recorder was used. The special experimental arrangement prevented the appearance of these irregularities, henceforth called secondary waves, during the first surge, which helped considerably the theoretical exposition. However, they were later superimposed on both the negative and positive surges. The reasons, which are not entirely different in both instances, are the main subject of discussion in this paper.
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References
1.
KamelM. Y. M.1954 M.Sc. Thesis, Faculty of Engineering, Cairo University, ‘Cavitation Produced by Fast Velocity Changes in Pipes’.
2.
LeconteJ. N.1937Trans. Amer. Soc. mech. Engrs, vol. 59, p. 691, ‘Experiments and Calculations on the Resurge Phase of Water Hammer’.
3.
BinnieA. M.ThackrahD. G.1951Proc. Instn mech. Engrs, Lond., vol. 165, p. 43, ‘Water Hammer in a Pumping Main and its Prevention’.
4.
De HallerP.BéduéA.1951 Sulzer Technical Review No. 4, p. 18, ‘The Breakaway of Water Columns as a Result of Negative Pressure Shocks’.
5.
EscandeL.1953‘Supressions engendrées dans un canal de fuite en charge par l'arrêt instantané du débit des turbines, en l'absence de chambre d'équilibre’ (paper published privately at Toulouse, in a book containing papers by L. Escande and his colleagues).
6.
StepanoffA. J.1949Trans. Amer. Soc. mech. Engrs, vol. 71, p. 515, ‘Elements of Graphical Solution of Water Hammer Problems in Centrifugal Pump Systems’.
