低温蓄冷器流动特性的理论分析和实验研究 第三部分:压降因子和摩擦系数  

Theoretical And Experimental Study On The Flow Characteristics For A Regenerator Under Low Temperature Part Ⅲ:Pressure Drop Factor And Friction Factor

作　　者：王仑[1] 袁鹍[1] 周远[1] 巨永林[1] 

机构地区：[1]中国科学院理化技术研究所,北京100080

出　　处：《低温与超导》2001年第4期11-16,共6页Cryogenics and Superconductivity

摘　　要：交变流动蓄冷器的压降因子和阻力系数对实际的工程计算、数值模拟及制冷机的设计有重要的意义 ,然而对低温交变流动蓄冷器的阻力特性一直缺乏系统的实验结果。文中给出了低温交变流动蓄冷器的压降因子及液氮温区交变流动蓄冷器摩擦系数的拟合公式 ,并为常温下的实验对比 。The pressure drop factor and friction factor of the regenerator under oscillating flow are very useful for actual engineering calculation, numeric simulation and designing of the cryocoolers. However, for regenerator in oscillating flow under low temperature conditions, the systemic experimental results are always lacking. In this paper, for regenerator in oscillating flow, we give the pressure drop factor under low temperature conditions and fitting equation of the friction factor under temperature range of liquid nitrogen. Also, these results are compared with those which were drawn at ambient temperature. This paper can provide reference to the designing of the regenerator under low temperature.

关 键 词：低温蓄冷器 压降因子 摩擦系数 理论分析 实验研究 设计 流动特性 阻力系数 脉冲管制冷机 

分 类 号：TB651[一般工业技术—制冷工程] TB611