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Measurement of Cavitation Erosive Aggressiveness by Means of Structure Born Noise

Lohrberg, Henrik and Stoffel, Bernd (2001) Measurement of Cavitation Erosive Aggressiveness by Means of Structure Born Noise. In: CAV 2001: Fourth International Symposium on Cavitation, June 20-23, 2001, California Institute of Technology, Pasadena, CA USA. (Unpublished) http://resolver.caltech.edu/CAV2001:sessionA3.003

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Abstract

A measuring system was developed to estimate the cavitation erosive aggressiveness in a centrifugal pump during operation. The system is based on acoustical means. Acoustic pressure waves in water and vibrations of machine casings underlie several disturbances especially by changes of the transmission behaviour of the fluid during operation. Thus, an approach based on the structure born noise measured directly on the mechanical structure exposed to the cavitation was chosen to minimise this problems. The sensor, the amplifier and the signal processing and transmission devices have then to be placed within the rotating part of the machine. The measurements of the system have been compared with results of measurements using material specimen and coatings of soft copper. The physical relation between the acoustical event amplitudes detected by the system and the sizes of pits found on the specimen is discussed.


Item Type:Conference or Workshop Item (Lecture)
Subject Keywords:cavitation, mechatronics, centrifugal pump, structure born noise
Record Number:CAV2001:sessionA3.003
Persistent URL:http://resolver.caltech.edu/CAV2001:sessionA3.003
Usage Policy:The papers of this symposium proceedings are protected by copyright, retained by the authors. Authors control translation and reproduction rights to these works. However, readers are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format. This permission is in addition to rights of reproduction granted under Section 107, 108, and other provisions of the U.S. Copyright Act.
ID Code:53
Collection:CaltechCONF
Deposited By: Imported from CAV2001
Deposited On:26 Apr 2001
Last Modified:26 Dec 2012 07:09

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