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分析了冻结管的材质、结构、布置方式、串联方式等不同条件下液氮冻结试验中的管壁温度数据.结果表明:采用传统冻结管结构的液氮冻结中,冻结管口与管底的管壁温度差别较大,在冻结管长度方向上管壁温度成近线性分布;采用在供液管上开孔的冻结管结构,可以有效减少冻结管壁的温差,特别是在供液管底部封堵后,采用较小的开孔间距时,冻结管壁温度分布基本是均匀的;在冻结管串联时,相同深度位置进液管壁温度都低于出气管壁温度,且两者的温差基本一致.液氮灌入量、冻结管材料、结构和连接方式是影响冻结管壁温度分布的主要因素.
The tube wall temperature data in different conditions such as material, structure, arrangement and series connection of liquid nitrogen freezing were analyzed.The results showed that in the freezing of liquid nitrogen with the traditional freezing tube structure, Tube wall temperature difference between the larger, in the length of the frozen tube wall temperature into the near linear distribution; the use of liquid in the open tube freezing tube structure, can effectively reduce the temperature difference between the frozen tube wall, especially in the bottom of the liquid supply pipe After sealing, the temperature distribution of the frozen pipe wall is basically uniform with the smaller opening spacing; when the freezing pipe is connected in series, the inlet pipe wall temperature at the same depth position is lower than the outlet pipe wall temperature, and the temperature difference between the two Basically the same.The liquid nitrogen influx, frozen pipe material, structure and connection is the main factor affecting the temperature distribution of the frozen wall.