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用可视实验装置研究了流体欠热度对容器排放特性的影响。研究发现:蒸汽与排放容器中的冷流体作用形成的蒸汽冷凝特性极大地影响了容器中流体的排放过程。欠热度愈大,蒸汽冷凝换热过程愈强,蒸汽汽柱入水深度愈深,因此蒸汽可能在压力平衡管中达到临界流速,从而产生蒸汽供应限制,形成小排放流量阶段;系统(汽源)压力对后期排放流量和蒸汽汽柱入水深度也有一定影响。
The influence of the fluid underheat on the discharge characteristics of the vessel was studied with a visual experimental apparatus. It was found that the condensation of steam formed by the action of cold fluid in the steam and discharge vessel greatly influenced the fluid discharge in the vessel. The greater the under-heating, the stronger the steam condensing heat transfer process and the deeper the steam column enters the water. Therefore, the steam may reach the critical flow rate in the pressure balance pipe to generate the steam supply restriction and form a small discharge flow stage. The system (steam source) Pressure on the post-discharge flow and steam column into the water depth has a certain impact.