气动系统中管路的二维粘性流场计算

Calculation of a Two-dimensional Viscous Flow Field in the Pipe of a Pneumatic System

为了更加深入地研究气动系统中管路流动特性和各个参数的变化规律 ,作者运用SIMPLE算法对两端带有节流口的管路进行二维粘性流场计算。在管路的进口处 ,给定总压力和总温度。根据管路的几何特性和流动特点 ,对计算区域划分了五个区域 ,并给出了相应的分区算法。数值计算结果表明本算法可以清晰地反映管路流动的特性以及相应的参数变化趋势。本方法不仅可以计算出管路内部的流场 。

With the help of an algorithm SIMPLE a two dimensional viscous flow field was calculated with respect to a pipe, which has its two ends fitted with a throttle orifice. This is performed for facilitating an in depth study of pipe flow characteristics in a pneumatic system and the law of variation of various parameters. A stagnation pressure and stagnation temperature were set at the pipe inlet. On the basis of the pipe geometric characteristics and flow features a calculation zone has been divided into five domains with corresponding domain algorithm being given. The results of numerical calculation indicate that the algorithms provided can clearly reflect the flow characteristics in the pipe and the variation trend of relevant parameters. With the method under discussion it is possible to calculate not only the flow field within the pipe but also the flow field of the jet flow zone at the end of the pipe.