Influence of phase angle and dead volume on gamma-type Stirling engine power using CFD simulation

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Colleges, School and Institutes


This work presents the development and validation of computational fluid dynamics (CFD) model of 500 W gamma-type Stirling engine prototype to highlight the effects posed by phase angle and dead volume variations on engine performance. The model is based on a realistic Local Thermal Non-Equilibrium (LTNE) approach for porous domains in the engine (cooler and regenerator). The simulation results showed an acceptable degree of accuracy of 9% and 5%, respectively when comparing with experimental results in predicting the indicated and cooling powers at different heating temperatures. It is found that the maximum indicated power is achieved at a phase angle of 105° rather than at the common phase angle of 90°. The dead volume (connecting pipe) is observed to pose negative effects on engine indicated power and therefore, an optimum value of pipe diameter exists.


Original languageEnglish
Pages (from-to)130-140
Number of pages11
JournalEnergy Conversion and Management
Early online date12 Jul 2016
Publication statusPublished - 15 Sep 2016