Complete Characteristics of Centrifugal Pumps and Their Use in the Prediction of Transient Behavior

Knapp, R. T.

Published November 1937 | Version Reprint

Journal Article Open

Complete Characteristics of Centrifugal Pumps and Their Use in the Prediction of Transient Behavior

Knapp, R. T.

This paper describes the technique of determining the complete operating characteristics of a hydraulic machine such as a centrifugal pump or a turbine, together with a method of presenting these characteristics in a convenient manner on a single diagram. The characteristics of a modern, high-head, high-efficiency pump are analyzed and presented in the manner proposed. The use of these complete characteristics for the prediction of the behavior of the machine during operating transients is discussed and the analytical background is presented. The assumptions involved are investigated and experimental checks of their validity are offered. The interrelationships between the hydraulic characteristics of the machine and the pipe line are indicated.

Additional Information

©1937 A.S.M.E. Contributed by the Hydraulic Division for presentation at the Second Water-Hammer Symposium, in cooperation with the American Society of Civil Engineers and the American Water Works Association, at the Annual Meeting of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS, to be held in New York, N.Y., Dec. 6 to 10, 1937. In addition to the men whose names are mentioned in references (2) and (3) and to the Byron-Jackson Company and the Metropolitan Water District, the author wishes especially to acknowledge the assistance of Dr. Geo. F. Wislicenus, who worked diligently with him in installing the apparatus and instruments in the original laboratory, who helped direct the experimental work, and who collaborated with him on the analysis and application of the results.

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