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Tailoring the pressure-drop in multi-layered open-cell porous inconel structures

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Abstract

This study investigates the pressure-drop behaviour associated with airflow through bulk and structurally tailored multi-layered, open-cell porous Inconel structures over a wide airflow velocity range (0–50 m s−1). The effect of airflow velocity on the pressure-drop behaviour as a function of the sample thickness is presented and related to the flow behaviour corresponding to the relevant flow regimes (Darcy, Forchheimer, Turbulent and Post-turbulent). Entrance effects are highlighted as a source of the pressure-drop increase for porous structures with air gaps, regardless of their sizes, as long as they are larger than those generated by loosely-stacked structures. The pressure-drops for gapped porous structures and the mathematical-summation of the pressure drop for the corresponding individual components, were in very good agreement, at lower airflow velocities. The potential for mass-efficient porous structures, providing a high pressure-drop, was demonstrated using multiple thin porous laminates separated by air gaps.

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Authors and Affiliations

  1. Manufacturing Research Division, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK

    Hatem Oun & Andrew Kennedy

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  1. Hatem Oun
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  2. Andrew Kennedy
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Correspondence to Hatem Oun.

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I declare that the experiments in the manuscript submitted comply with the current laws of the United Kingdom.

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Oun, H., Kennedy, A. Tailoring the pressure-drop in multi-layered open-cell porous inconel structures. J Porous Mater 22, 1627–1633 (2015). https://doi.org/10.1007/s10934-015-0046-2

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  • DOI: https://doi.org/10.1007/s10934-015-0046-2

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