A New High Supply Pressure Pneumatic Flapper-Nozzle With Linear Behavior

[+] Author and Article Information
S. Colin

Laboratoire de Génie Mécanique de Touicuse, INSAT Complexe Scientifique de Rangueil, 31007 Toulouse Cédex, France

A. Bonnet

Département d’Aéordynamique, Ecole Nationale Supéieure de l’Aéronautique et de I’Espace, 10 avenue Edouard Belin, BP 4032, 31055 Toulouse Cédex, France

R. Caen

Département de Génie Mécanique, Institut National des Sciences Appliquées de Toulouse, avenue de Rangueil, 31077 Toulouse Cédex, France

J. Dyn. Sys., Meas., Control 118(2), 259-266 (Jun 01, 1996) (8 pages) doi:10.1115/1.2802312 History: Received March 01, 1994; Online December 03, 2007


In order to optimize the devices which incorporate flapper-nozzle systems, the behavior of these systems must be completely modeled theoretically. However, the complexity of the flow between the nozzle and the flapper generally requires an empirical calibration of the discharge coefficients. In this article we will propose two types of flapper-nozzle designs which make completely theoretical determination of steady flow possible. This is required for device optimization. The second design makes it possible to obtain strictly linear behavior, which offers several advantages compared to classic devices. The results of experimental testing correspond closely to the theoretical predictions.

Copyright © 1996 by The American Society of Mechanical Engineers
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