Numerical Simulations of Thermal-Fluid Fields and Fluid-Structure Interactions for an Alpha Type Stirling Engine

• Main Authors: Chia-bao Chu, 朱家葆
• Other Authors: Yung-ming Lee
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/77203950858312114000

碩士 === 逢甲大學 === 航太與系統工程所 === 99 === In this study, the numerical method is applied to solve the two-dimensional thermal-fluid field of an Alpha type Stirling engine. The effect of related parameters on the power output of the engine is investigated. The parameters include charge pressure, temperature of hot end, the size of the regenerative channel, phase lag, rotational speed, the porosity of the regenerator, working fluid, bore/stroke ratio and so on. For the case of thermal-fluid simulation, rotational speed is assumed to be constant. However, whenever the effect of fluid-structure interaction with rigid body motion on the performance of the engine take into account, this constrain is relaxed. The numerical results of these two simulations are in comparison with each other. The prototype of the engine is an Alpha type Stirling engine. The dynamic simulation and the adaptive grid generation are utilized in the numerical computations. It is assumed that the working fluids is compressible ideal-gas and the flow is transient and turbulent.