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3. Characteristics of an electro-pneumatic power modulator
3.1 Compressible fluid flow laws
An electro-pneumatic power modulator controls gas energy transfer by driving variable-area orifices.
For compressible fluids, the mass flow through each passage section is a function of the pressures upstream and downstream of the section in question. ISO 6358-1989 proposes a mathematical approximation of the laws of flow through a fixed restriction using two parameters:
the sonic conductance C, expressed in m 3 · s –1 · Pa –1 , the image of the effective cross-sectional area of the component determined in the sonic regime;
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Characteristics of an electro-pneumatic power modulator
Industrial applications
Bibliography
References
Standards and norms
- Transmissions pneumatiques ; éléments traversés par un fluide compressible. Détermination des caractéristiques de débit - ISO 6358 - 10-89
- Transmissions pneumatiques ; atmosphère normalisée de référence (ANR) - ISO 8778 - 07-03
- Transmissions pneumatiques ; identification des orifices et des mécanismes de commande des distributeurs et autres composants - ISO 11727 - 08-04
Directory
ARTEMA (UNITOP – Union Nationale des Industries de Transmissions Oléo hydrauliques et Pneumatiques) http://www.artema-france.org
INSA Lyon laboratoire Ampère – Unité Mixte de Recherche CNRS 5005 http://www.ampere-lab.fr
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