In this article, six kinds of reverse Brayton cycles of helium are studied analytically and the flow field of the header of their heat exchangers is simulated numerically. 本文正是基于上述考虑,选取了六种氦气逆布雷顿制冷循环模式,并对其进行了热力学分析,详细地讨论并对比了各个循环模式的用能情况,同时还对回路中采用的换热器封头内部流场进行了数值模拟。
The flow field around the secondary filter was vividly characterized with a porous medium model, so that the flow pattern around this kind of filter was readily obtained. 多孔介质模型形象地描绘出了二次滤网的内部流场,获得了该型号滤网的内部流动规律。