CFD Simulation and Losses Analysis of a Beta-Type Stirling Engine
Mikhael, N., El-Ghandour, M., El-Ghafour, S. (2018). CFD Simulation and Losses Analysis of a Beta-Type Stirling Engine. EKB Journal Management System, 22(2), 85-101. doi: 10.21608/pserj.2018.32106
Nady Nageeb Mikhael; Mouhamed El-Ghandour; Shirehan El-Ghafour. "CFD Simulation and Losses Analysis of a Beta-Type Stirling Engine". EKB Journal Management System, 22, 2, 2018, 85-101. doi: 10.21608/pserj.2018.32106
Mikhael, N., El-Ghandour, M., El-Ghafour, S. (2018). 'CFD Simulation and Losses Analysis of a Beta-Type Stirling Engine', EKB Journal Management System, 22(2), pp. 85-101. doi: 10.21608/pserj.2018.32106
Mikhael, N., El-Ghandour, M., El-Ghafour, S. CFD Simulation and Losses Analysis of a Beta-Type Stirling Engine. EKB Journal Management System, 2018; 22(2): 85-101. doi: 10.21608/pserj.2018.32106

CFD Simulation and Losses Analysis of a Beta-Type Stirling Engine

Port-Said Engineering Research Journal
Article 10, Volume 22, Issue 2 - Serial Number 1110, September 2018, Page 85-101  XML PDF (1.8 MB)
Document Type: Original Article
DOI: 10.21608/pserj.2018.32106
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Authors
Nady Nageeb Mikhael1; Mouhamed El-Ghandour2; Shirehan El-Ghafour email 3
1Emirate Professor, MPE Department, Faculty of Engineering, Port-Said University, Port-Said, Egypt,
2Assistant Professor, MPE Department, Faculty of Engineering, Port-Said University, Port-Said, Egypt
3Assistant lecturer, MPE Department, Faculty of Engineering, Port-Said University, Port-Said, Egypt
Abstract
A three-dimensional Computational Fluid Dynamics (CFD) simulation for the beta-type Stirling engine is performed. Firstly, a thorough characterization of the thermal and fluid flow fields during the cycle is presented. Secondly, a comprehensive energy analysis for the engine is conducted to accurately identify the sources and magnitudes of thermodynamic losses. Computational results show a close agreement with the experimental results with an accuracy of about 96%. Within the compression and expansion spaces, the dominant heat transfer rates occur during the expansion strokes due to the significant impinging effect of the tumble vortices generated from the flow jetting. Furthermore, the jetting and ejecting processes into the regenerator is characterized by a significant temperature gradient and a large matrix temperature oscillation. The pressure difference between the expansion and compression spaces is the main driver for the flow leakage through the appendix gap. From the energy analysis, the regenerator thermal loss and the pumping power represent the largest part of the Stirling engine losses by about 9.2% and 7.5%, respectively.
Keywords
Beta-type Stirling engine; GPU-3; CFD; Losses
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