A computational fluid dynamics study on the heat transfer characteristics of the working cycle of a low-temperature-differential gamma-type Stirling engine

作者：Chen Wen Lih^*; Wong King Leung; Chang Yu Feng

来源：International Journal of Heat and Mass Transfer, 2014, 75: 145-155.

DOI：10.1016/j.ijheatmasstransfer.2014.03.055

• gamma-Type Stirling engine
• CFD
• Compressible flow

A three-dimensional compressible CFD code has been developed to study the heat transfer characteristics of a twin-power piston gamma-type Stirling engine. The results include temperature contours, velocity vectors, and distributions of local heat flux along solid boundaries at several important time steps as well as variation of average temperatures, integrated rates of heat input, heat output, and engine power. It is found that Impingement is the major heat transfer mechanism in the expansion and compression chambers, and the temperature distribution is highly non-uniform across the engine volume at any given moment. This study sheds light into the complex heat transfer mechanism inside the Stirling engine and is very helpful to the understanding of the fundamental process of the engine cycle.

• 出版日期2014-8