Separation phenomena for gaseous mixture flowing through a long tube into vacuum
Separation phenomena for gaseous mixture flowing through a long tube into vacuum
复制标题
气体混合物通过长管进入真空的分离现象
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Denize Kalempa
中科院分区：
文献类型：
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作者：
F. Sharipov;Denize Kalempa
本文考虑混合气体通过长管进入真空的流动，假定管入口处的压力是任意的。因此，流动状态可以从入口处的流体动力学变化到管出口处的自由分子。得到了不同入口浓度和稀薄度下氦氙混合气体的密度和浓度沿着分布。结果表明，浓度沿着管的变化可以是显著的。计算决定下流容器中化学组成的两种物质的流速。对这些数据的分析表明，下流容器中的化学成分可能不同于上流容器中的化学成分，即，发生分离现象。本文的结果可用于实际中，以避免分离现象或加强它，如果必要的。
A gaseous mixture flow through a long tube into vacuum is considered assuming the pressure to be arbitrary at the tube entrance. Thus, the flow regime can vary from hydrodynamic at the entrance to free molecular at the tube exit. The distributions of density and concentration along the tube were obtained for the mixture helium–xenon at various values of the concentration and rarefaction at the tube entrance. It was shown that the variation of the concentration along the tube can be significant. The flow rates of both species determining the chemical composition in the down flow container were calculated. An analysis of these data shows that the chemical composition in the down flow container can be different from that in the up flow one, i.e., the separation phenomenon takes place. The results presented in the article can be used in practice to avoid the separation phenomenon or to intensify it if necessary.