密度锁内稳态分层特性的实验研究

通过可视化观察方法，对3种不同实验管内的冷热流体分层特性进行实验研究，同时，根据界面力的平衡条件，对密度锁内分层的稳定性进行了分析。稳态工况下，密度锁内冷热流体间存在一界面层，且界面层内具有较大的温度梯度；界面层的稳定性受温度交界面处的扰动速度及界面层内温度梯度的影响，稳定的界面层对阻止冷热流体搅混具有积极作用。另外，对实验管内有无隔板情况进行分层特性对比实验，表明密度锁内的蜂窝通道不但有利于界面层的稳定，且有利于界面形成位置的控制。

Experimental Study on Steady-State Characteristics of Stratification in Density Lock

With the method of visible observation, experimental study on characteristics of stratification between hot and cold fluid was made in three different experimental tubes. In the meantime, according to the condition in which the force acted on the interface was balanced, analyses on the stability of fluid stratification in the density lock were done. The results show that in steady state conditions, there is an interface layer between hot and cold fluids in the density lock, and also there is a large temperature gradient in the interface layer. The stability of this layer is affected by velocity of disturbance on the interface and the temperature gradient in the interface layer. The stable interface layer plays an active role in preventing hot and cold fluids from being mixed. Besides, contrastive experiments on characteristics of fluid stratification were made when there was a partition or not respectively in experimental tubes. It shows that the honey comb channel in the density lock not only benefits for the stability of interface layer, but also is lucrative for the control on the position of interface.