压力和充满率对低温气瓶蒸发流量影响的研究  

Study on influence of pressure and filling level on mass flow of cryogenic insulated cylinder

作　　者：谢柳辉 朱华强 蔡延彬 张夏 Xie Liuhui;Zhu Huaqiang;Cai Yanbin;Zhang Xia(Guangdong Institute of Special Equipment Inspection and Research Dongguan Branch,Dongguan 523120,China)

机构地区：[1]广东省特种设备检测研究院东莞检测院,东莞523120

出　　处：《低温与超导》2022年第6期97-102,共6页Cryogenics and Superconductivity

基　　金：广东省质量技术监督局科研项目(2018PT03);东莞市社会科技发展(一般)项目(20185071641134);广东省特种设备检测研究院科研项目(2020CY-2-13)资助。

摘　　要：蒸发率是低温气瓶绝热性能的一项重要指标,本文将气瓶做一维传热过程分析,采用二维轴对称的VOF(Volume of Fluent)模型,数值模拟研究了压力和充满率对低温绝热气瓶蒸发状态的影响。结果显示,当气瓶工作压力数倍于大气压力时,压力越高,气瓶出口蒸发质量流量越高。在蒸发过程中,气瓶内液相区温度基本保持不变,而气相区温度则出现明显的分层现象。当充满率降低时,由于液体减少,蒸发质量流量随之降低,但仍随着工作压力的升高而增大。The evaporation rate is one of the important measure indicators of thermal insulation performance of cryogenic insulation cylinder. A one-dimensional heat transfer process of the gas cylinder was analyzed, a two-dimensional axi-symmetric VOF(Volume of Fluent) model was built, and the effect of pressure and filling rate on the cryogenic insulation cylinder were studied by numerical simulation. The results show that when the working pressure of the cylinder is several times higher than the atmospheric pressure, the higher the pressure, the higher the evaporative mass flow at the outlet of the air cylinder. During the evaporation process, the temperature of the liquid phase in the gas cylinder remains basically unchanged, while the temperature of the gas phase shows obvious stratification. When the filling rate decreases, the evaporative mass flow decreases due to the decrease in liquid, but still increases with the increase of the working pressure.

关 键 词：低温绝热气瓶 蒸发流量 VOF模型 气液相变 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]