Abstract
The first objective of this work is to study the flow evolution through a gamma-type Stirling engine by a numerical tool. The quasi-steady model formulated by Urieli and Berchowitz (Stirling cycle engine analysis. Techno House, Radcliffe Way, Bristol ISBN 0-85274-435-8 (A. Hilger, Bristol), 1984) was adopted. The thermal and the mechanical losses generated in a Stirling engine are added to the model. The pressure drop through the heat exchangers was calculated to assess the friction factor value. The parameters characterizing the flow in the engine are calculated (Nusselt, Reynolds, and Darcy friction factor) and discussed. The proposed model will be used to estimate these factors. In a second part, the correlations proposed in the literature (Tanaka 1993; Gedeon and Wood Oscillating-flow regenerator test rig: hardware and theory with derived correlations for screens and felts. NASA CR-198442, 1996) to study the turbulent flow are applied to the gamma-type Stirling engine to proceed to the best theoretical results that better describe the experimental ones.
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Acknowledgments
This work was supported by the LAMIH CNRS UMR 8201 (University of Valenciennes), the laboratory LESTE (ENIM, Monastir, Tunisia), and the European Commission within the International Research Staff Exchange Scheme (IRSES) in the 7th Framework Programme FP7/2014-2017/ under REA grant agreement n°612230. These supports are gratefully acknowledged.
In memory of Professor Sassi BEN NASRALLAH This research was initially initiated at the LEST laboratory of ENIM (University of Monastir, Tunisia) and LAMIH laboratory UMR CNRS 8201 (University of Valenciennes and Hainaut-Cambresis - UVHC) by Professors Sassi BEN NASRALLAH (co-author of this current paper) and Fethi ALOUI. Prof. Sassi BEN NASRALLAH, left us suddenly on June 27th, 2017 after the final submission of this paper. We would like firstly to pay a very great tribute to him. Professor Sassi BEN NASRALLAH was an excellent teacher and researcher, very serious, scientifically very curious and very human. With him, we lost more than just a collague or Professor, but also a very dear brother.
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Gheith, R., Hachem, H., Aloui, F., Nasrallah, S.B. (2018). Experimental and Theoretical Investigation of Flows Inside a Gamma Stirling Engine Regenerator. In: Aloui, F., Dincer, I. (eds) Exergy for A Better Environment and Improved Sustainability 1. Green Energy and Technology. Springer, Cham. https://doi.org/10.1007/978-3-319-62572-0_27
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