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research-article

Performance analysis of the small scale ?-type Stirling engine using CFD tools

[+] Author and Article Information
Zbigniew P. Bulinski

Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland
zbigniew.bulinski@polsl.pl

Ireneusz Szczygiel

Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland
ireneusz.szczygiel@polsl.pl

Adam Kabaj

Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland
adam.kabaj@polsl.pl

Tomasz Krysinski

Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland
tomasz.krysinski@polsl.pl

Pawel Gladysz

Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland
pawel.gladysz@polsl.pl

Lucyna Czarnowska

Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland
lucyna.czarnowska@polsl.pl

Wojciech Stanek

Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland
wojciech.stanek@polsl.pl

1Corresponding author.

ASME doi:10.1115/1.4037810 History: Received December 15, 2016; Revised August 24, 2017

Abstract

The paper presents the Computational Fluid Dynamics (CFD) model of small-scale ?-type Stirling engine. The developed mathematical model comprises of Unsteady Reynolds Averaged Navier-Stokes (URANS) set of equations i.e. continuity, momentum and energy equations, turbulence was modelled using standard k-w model. Moreover, presented numerical model covers all modes of heat transfer inside the engine: conduction, convection and radiation. The model was built in the framework of the commercial CFD software ANSYS Fluent. Piston movements were modelled using dynamic mesh capability in ANSYS Fluent, their movement kinematics was described based on the crankshaft geometry and it was implemented in the model using user defined functions (UDF) written in C programming language and compiled with a core of the ANSYS Fluent software. The developed numerical model was used to assess the performance of the analysed Stirling engine. For this purpose, different performance measures were defined, including coefficient of performance, exergy efficiency and irreversibility factor. The proposed measures were applied to evaluate the influence of different heating strategies of the small alpha-type Stirling engine.

Copyright (c) 2017 by ASME
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