A computational fluid dynamics study on the heat transfer characteristics of the working cycle of a low-temperature-differential γ-type Stirling engine
A computational fluid dynamics study on the heat transfer characteristics of the working cycle of a low-temperature-differential γ-type Stirling engine
复制标题
DOI：
10.1016/j.ijheatmasstransfer.2014.03.055
复制
发表时间：
2014-08
影响因子：
5.2
通讯作者：
W. L. Chen;King-Leung Wong;Y. Chang
中科院分区：
文献类型：
--
作者：
W. L. Chen;King-Leung Wong;Y. Chang
开发了一个三维可压缩计算流体动力学程序，用于研究双动力活塞γ型斯特林发动机的传热特性。结果包括温度等值线，速度矢量，和分布的局部热流沿着固体边界在几个重要的时间步长，以及平均温度的变化，热输入，热输出的综合率，和发动机功率。结果表明，冲击是膨胀室和压缩室中的主要传热机制，并且在任何给定时刻，发动机容积内的温度分布都是高度不均匀的。本文的研究揭示了斯特林发动机内部复杂的传热机理，有助于理解发动机循环的基本过程。
A three-dimensional compressible CFD code has been developed to study the heat transfer characteristics of a twin-power pistonγ-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.