Theoretical Simulation and Optimization of a Free-Piston Stirling Engine

• Main Authors: Chin-WenChuang, 莊靜雯
• Other Authors: Chin-Hsiang Cheng
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/83885820031192761689

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 100 === In order to improve the performance of free-piston Stirling, a simulation with a theoretical model combined with the optimized analysis by simplified conjugate gradient method has been performed in this study. This theoretical model is composed of thermal model and dynamic model. In irreversible thermal model, using momentum equations as the government equations to calculate the transient influence of temperature, volume, pressure and mass in each chamber inside the Stirling engine, and then considering the property of spring and loading, the acceleration, velocity and displacement can get from the pressure difference between expansion chamber and compression chamber in the dynamic model. The optimized analysis is considerated with the stiffness coefficient, the gap of regenerator access and the mass of displacer or piston. According to these influential factors, we can use the simplified conjugate gradient method as the optimized method to improve the performance of free-piston Stirling.