The Response of a Centrifugal Pump to Fluctuating Rotational Speed-Reference-Cited by-同舟云学术

The Response of a Centrifugal Pump to Fluctuating Rotational Speed

Published:1995-09-01 Issue:3 Volume:117 Page:479-484
ISSN:0098-2202
Container-title:Journal of Fluids Engineering
language:en
Short-container-title:

Author:

Tsukamoto H.¹,Yoneda H.²,Sagara K.³

Affiliation:

1. Kyushu Institute of Technology, Tobata, Kitakyushu, 804 Japan

2. Technical Development Bureau, Nippon Steel Corporation, Futtsu-city, Chiba, 299-12 Japan

3. Nagasaki Shipyard & Machinery Works, Mitsubishi Heavy Industries, Ltd., Nagasaki, 850-91 Japan

Abstract

A theoretical and experimental study has been made on the dynamic characteristics of a centrifugal pump subject to sinusoidal changes in rotational speed. Time-dependent rotational speed, flow-rate, and total pressure rise are measured for a variety of amplitude and frequency of the fluctuating rotational speed. Measured flow-rate as well as total pressure rise is compared with the quasi-steady ones. Unsteady flow analysis is made for a two-dimensional circular cascade by use of the singularity method. The calculated frequency characteristics are compared with the corresponding experimental ones. The deviation of unsteady characteristics from quasi-steady ones is evident, and the numerical results agree qualitatively with the measured ones. It was found that with the increased frequency of rotational speed fluctuations the dynamic characteristics deviate remarkably from quasi-steady ones. Moreover, a criterion for the assumption of quasi-steady change is presented.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/fluidsengineering/article-pdf/117/3/479/5900471/479_1.pdf

Reference10 articles.

1. Anderson, D. A., Blade, R. J., and Stevans, W., 1971, “Response of a Radial-Bladed Centrifugal Pump to Sinusoidal Disturbances for Noncavitating Flow,” NASA TN D-6556.

2. Brennen C. , and AcostaA. J., 1976, “The Dynamic Transfer Function for a Cavitating Inducer,” ASME JOURNAL OF FLUIDS ENGINEERING, Vol. 98, No. 2, pp. 182–191.

3. Guarga, R., 1991, “Instability due to Performance Characteristics,” Vibration and Oscillation of Hydraulic Machinery, H. Ohashi, ed., Avebury Technical, Aldershot, pp. 175–196.

4. Imaichi K. , TsujimotoY., and YoshidaY., 1982, “An Analysis of Unsteady Torque on a Two-Dimensional Radial Impeller,” ASME JOURNAL OF FLUIDS ENGINEERING, Vol. 104, No. 2, pp. 228–234.

5. Knapp R. T. , 1937, “Complete Characteristics of Centrifugal Pumps and Their Use in the Prediction of Transient Behavior,” ASME Transactions, Vol. 59, pp. 683–689.

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