A New Calibration Method for Dynamically Loaded Transducers and Its Application to Cavitation Impact Measurement-Reference-Cited by-同舟云学术

A New Calibration Method for Dynamically Loaded Transducers and Its Application to Cavitation Impact Measurement

Published:1998-12-01 Issue:4 Volume:120 Page:712-718
ISSN:0098-2202
Container-title:Journal of Fluids Engineering
language:en
Short-container-title:

Author:

Soyama Hitoshi¹,Lichtarowicz Andrzej²,Momma Takahiro³,Williams Edward J.²

Affiliation:

1. Department of Machine Intelligence and Systems, Tohoku University, Sendai, Japan

2. Department of Mechanical Engineering, University of Nottingham, Nottingham, NG7 2RD, United Kingdom

3. Nuclear Power Department, Construction Group, Kajima Corporation, Tokyo, Japan

Abstract

The erosion produced by cavitation is a serious problem in hydraulic machinery. During investigations of the dynamic loading generated by collapsing cavitation on a surface, a dynamic pressure transducer was developed. The piezoelectric polymer PVDF (Polyvinylidene fluoride) was used as the pressure sensitive material. A novel method of dynamic calibration has also been developed. The transducer is loaded through pencil lead by a beam supported at its other end on a knife edge and loaded at the center by weights. As the static load is increased, the pencil lead breaks and the load is released suddenly. The unloading time is faster than for any other conventional calibration method and is of the same order as cavitation loading. Descriptions of the developments of both the calibration method and the transducer are given. The principal advantages of the new method are the short pulse duration and the simplicity of the test procedure. The paper is an extension of the previously reported work by Momma and Lichtarowicz (1994), giving further information on the operating characteristics of the transducer in comparison with the traditional ball-dropping method.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/fluidsengineering/article-pdf/120/4/712/5900370/712_1.pdf

Reference14 articles.

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2. Bauer, F., and Moulard, H., 1988, “State-of-the-Art in the Research Work of Piezoelectric PVF2 Polymer Shock Gauges,” Shock Waves in Condensed Matter, pp. 627–630.

3. Dutta, P. K., and Kalafut, J., 1990, “Evaluation of PVDF Piezopolymer for Use as Stock Gauge,” Special Report, 90–223, US Army Corps of Engineers.

4. Henckels A. , and TakayamaK., 1986, “A Study of Shock Wave Propagation Phenomena in PMMA and Glass,” Report of Institute of High Speed Mechanics, Tohoku University, Vol. 52, pp. 28–43.

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