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Pressures in Penstock Caused by the Gradual Closing of Turbine Gates
This paper shows how the rise of pressure caused by the gradual closing of turbine gates may be determined from Professor Joukovsky's theory of maximum water-hammer. A solution of the problem by the trial-and-error method of arithmetic integration is first given, and then formulas are derived that cover any governor time and any relation between governor stroke and gate movement. Two factors which affect the rise of pressure are taken into consideration: (1) the elasticity of water and of the walls of the penstock; and (2) the effect of the net head on the phenomena which occur during the closing of the gates. Previous writers have submitted formulas which neglect one or other of these two factors, with the result that they do not give correct results in all cases. The limitations of such formulas are determined by the solution of the problem herein submitted.
Pressures in Penstock Caused by the Gradual Closing of Turbine Gates
This paper shows how the rise of pressure caused by the gradual closing of turbine gates may be determined from Professor Joukovsky's theory of maximum water-hammer. A solution of the problem by the trial-and-error method of arithmetic integration is first given, and then formulas are derived that cover any governor time and any relation between governor stroke and gate movement. Two factors which affect the rise of pressure are taken into consideration: (1) the elasticity of water and of the walls of the penstock; and (2) the effect of the net head on the phenomena which occur during the closing of the gates. Previous writers have submitted formulas which neglect one or other of these two factors, with the result that they do not give correct results in all cases. The limitations of such formulas are determined by the solution of the problem herein submitted.
Pressures in Penstock Caused by the Gradual Closing of Turbine Gates
Gibson, Norman R. (author)
Transactions of the American Society of Civil Engineers ; 83 ; 707-740
2021-01-01
341919-01-01 pages
Article (Journal)
Electronic Resource
Unknown
Pressures in penstocks caused by the gradual closing of turbine gates
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