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Extension of the universal erosive burning law to partly symmetric propellant grain geometries

Mukunda, HS and Paul, PJ and Javed, Afroz and Chakraborty, Debasis (2014) Extension of the universal erosive burning law to partly symmetric propellant grain geometries. In: ACTA ASTRONAUTICA, 93 . pp. 176-181.

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Official URL: http://dx.doi.org/10.1016/j.actaastro.2013.07.017

Abstract

This paper aims at extending the universal erosive burning law developed by two of the present authors from axi-symmetric internally burning grains to partly symmetric burning grains. This extension revolves around three dimensional flow calculations inside highly loaded grain geometry and benefiting from an observation that the flow gradients normal to the surface in such geometries have a smooth behavior along the perimeter of the grain. These are used to help identify the diameter that gives the same perimeter the characteristic dimension rather than a mean hydraulic diameter chosen earlier. The predictions of highly loaded grains from the newly chosen dimension in the erosive burning law show better comparison with measured pressure-time curves while those with mean hydraulic diameter definitely over-predict the pressures. (c) 2013 IAA. Published by Elsevier Ltd. All rights reserved.

Item Type: Journal Article
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Additional Information: copyright for this article belongs to Elesvier Science
Keywords: Erosive burning; Finocyl grain; CFD
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 11 Nov 2013 05:11
Last Modified: 11 Nov 2013 05:11
URI: http://eprints.iisc.ernet.in/id/eprint/47728

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