Two methods are presented for reducing the magnitude of the propagated pressure waves resulting from the reduction of flow in a reservoir-valve-pipe system. The theoretical performances of the two methods are investigated and compared with a third method developed by Streeter (1)†, and with that resulting from simple linear closure of the valve controlling the flow. The two methods indicate a maximum reduction of around 80 per cent in the magnitude of the pressure wave, and a significant reduction for valve closure in one pipe period.
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References
1.
StreeterV. L.‘Valve stroking to control water hammer’, Proc. Am. Soc. Civ. Engrs, J. Hydrauls Div.196389, 39–66.
2.
KinnoH.‘Dynamics of water hammer control systems’, J. Soc. mech. Engrs, Semi-Int. Symposium Tokyo, 1967 (September), Paper 128.
3.
WoodD. J.JonesS. E.‘Prediction and control of pressure surges due to valve closure’, Int. Conf. on Pressure Surges Canterbury, 1972 (September), Paper F1.
4.
PropsonT.Valve stroking to control transient flows in liquid piping systems Ph.D. Thesis, Civil Engineering Department, Michigan University, 1970.
5.
DrielsM. R.‘Design of a pressure transient control system’, Proc. Am. Soc. Civ. Engrs. J. Hydrauls Div.1975101, 437–448.
6.
ChestnutH.MayerR. W.Servomechanisms and regulating system design1951, Chapter 8 (Wiley).
