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Performance evaluation of piezoelectric and differential pressure sensor for vortex flowmeters

DSpace at IIT Bombay

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Title Performance evaluation of piezoelectric and differential pressure sensor for vortex flowmeters
 
Creator VENUGOPAL, A
AGRAWAL, A
PRABHU, SV
 
Subject Differential pressure sensor
Piezoelectric sensor
Bluff body
Strouhal number
BLUFF-BODY
STROUHAL NUMBER
FLOW METERS
BODIES
GEOMETRY
SHEDDER
PROBE
 
Description Piezoelectric and transient differential pressure sensors are two among the most widely employed sensors for vortex flowmeter application. The present study evaluates the performance of these two techniques under fully developed and disturbed flow conditions. Firstly, the location of the transient differential pressure sensor is optimized to obtain high amplitude signals and good linearity in Strouhal number. Empirical mode decomposition method in combination with autocorrelation decay is successfully employed at high Reynolds numbers to identify the vortex shedding frequency in presence of hydrodynamic noise. The performance of the differential pressure sensor deteriorates significantly under disturbed flow conditions at low Reynolds number due to the presence of low frequency components. This deterioration in the signal quality limits the lower operating range of the flowmeter with differential pressure sensor. The output signals of the piezoelectric sensor and differential pressure sensor under no flow condition are compared to obtain the background noise due to piping vibrations and electrical interferences. These results will help a designer to suggest robust signal processing algorithms for vortex frequency detection. (C) 2013 Elsevier Ltd. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2014-12-28T16:54:53Z
2014-12-28T16:54:53Z
2014
 
Type Article
 
Identifier MEASUREMENT, 5010-18
0263-2241
1873-412X
http://dx.doi.org/10.1016/j.measurement.2013.12.018
http://dspace.library.iitb.ac.in/jspui/handle/100/16937
 
Language English