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CFD BASED SIMULATION OF HYDROGEN RELEASE THROUGH ELLIPTICAL ORIFICES

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CFD BASED SIMULATION OF HYDROGEN RELEASE THROUGH ELLIPTICAL ORIFICES

Paraschivoiu, Marius and Shishehgaran, Nasim (2014) CFD BASED SIMULATION OF HYDROGEN RELEASE THROUGH ELLIPTICAL ORIFICES. International Journal of Hydrogen Energy, 39 (35). pp. 20350-20356.

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Abstract

Computational Fluid Dynamics (CFD) is employed to investigate the hydrogen jet exiting through different shapes of orifices. The effect of orifice geometry on the structure, development and dispersion of a highly under-expanded hydrogen jet close to the exit is numerically investigated. Various shapes of orifices are evaluated, including holes with constant areas such as elliptical and circular openings, as well as, enlarging circular orifices. A three-dimensional in-house parallel code is exploited to simulate the flow using an unstructured tetrahedral finite volume Euler solver. The numerical simulations indicate that, for a high pressure reservoir hydrogen release, the area of the orifice is the main geometric parameter influencing the centerline pressure at the hydrogen-air interface and the transient peak temperature, while the elliptical or expanding orifices slightly mitigate the auto-ignition risks associated with the accidental release of hydrogen. Therefore, circular openings represent the most conservative geometry for the study of auto-ignition of hydrogen.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical and Industrial Engineering
Item Type:Article
Refereed:Yes
Authors:Paraschivoiu, Marius and Shishehgaran, Nasim
Journal or Publication:International Journal of Hydrogen Energy
Date:December 2014
Keywords:Hydrogen; Computational Fluid Dynamics; Under-expanded Jet; Elliptical Orifice; Enlarging Orifice
ID Code:980108
Deposited By: GEOFFREY LITTLE
Deposited On:12 Jun 2015 15:48
Last Modified:18 Jan 2018 17:50
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