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Assessment of zero-dimensional, hybrid and multidimensional simulations for transient air flow through a cylinder-duct assembly

Bakshi, S and Ravikrishna, RV (2003) Assessment of zero-dimensional, hybrid and multidimensional simulations for transient air flow through a cylinder-duct assembly. In: Proceedings of the Institution of Mechanical Engineers - Part C: Mechanical Engineering Science, 217 (5). pp. 585-591.

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Abstract

The pressure-time characteristics for the charging process of a cylinder with a piston-controlled port through a connecting duct is studied with the objective of assessing the accuracy of various methods such as the lumped parameter or zero-dimensional approach, an intermediate hybrid approach and a full three-dimensional computational fluid dynamics (CFD) calculation. The predictions from all the approaches are compared with experimental data. It is observed that, for a particular cup-shaped geometry of the piston, both the zero-dimensional and hybrid approach overpredict the pressure recovery rate in comparison with the three-dimensional CFD calculation, which is in good agreement with the experimental pressure-time variation. On the other hand, the agreement between the lumped parameter approach and the detailed CFD calculation is better for a flat piston, indicating the importance of the piston geometry.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Professional Engineering Publishing.
Keywords: Pressure-time characteristics;Lumped parameter or zero-dimensional approach;CFD (computational fluid dynamics)
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 29 Jun 2007
Last Modified: 09 Jan 2012 08:38
URI: http://eprints.iisc.ernet.in/id/eprint/10709

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