The present paper describes an experimental investigation of the various parameters affecting the operation of industrial pneumatic controllers based on the jet nozzle principle. A test rig was built to monitor supply pressure, air temperature, airflow characteristics, and the static pressure distribution over the flat plate on which the jet impinges. The results demonstrate the existence of a low pressure, separated flow zone, subject to fouling, which subsequently was eliminated by appropriate changes of the injection nozzle geometry. The previous experimental findings were also confirmed by numerical simulation of the flow. Experimental results also show that the internal diameter of the regulator, situated inside the measuring branch, has an important influence on the sensitivity of the apparatus, as well as influencing its range.
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September 1997
Research Papers
The Influence of the Regulator Diameter and Injection Nozzle Geometry on the Flow Structure in Pneumatic Dimensional Control Systems
C. Crnojevic,
C. Crnojevic
Laboratory of Fluid Mechanics, University of Valenciennes, Valenciennes, France
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G. Roy,
G. Roy
School of Engineering, Universite´ de Moncton, Moncton, Canada
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P. Florent
P. Florent
Laboratory of Fluid Mechanics, University of Valenciennes, Valenciennes, France
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C. Crnojevic
Laboratory of Fluid Mechanics, University of Valenciennes, Valenciennes, France
G. Roy
School of Engineering, Universite´ de Moncton, Moncton, Canada
A. Bettahar
University of Chlaif, Algeria
P. Florent
Laboratory of Fluid Mechanics, University of Valenciennes, Valenciennes, France
J. Fluids Eng. Sep 1997, 119(3): 609-615 (7 pages)
Published Online: September 1, 1997
Article history
Received:
February 16, 1995
Revised:
January 28, 1997
Online:
December 4, 2007
Citation
Crnojevic, C., Roy, G., Bettahar, A., and Florent, P. (September 1, 1997). "The Influence of the Regulator Diameter and Injection Nozzle Geometry on the Flow Structure in Pneumatic Dimensional Control Systems." ASME. J. Fluids Eng. September 1997; 119(3): 609–615. https://doi.org/10.1115/1.2819288
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