摘要
对无负载热压缩机进行了数值模拟及实验研究,计算与实验结果表明,无负载情况下热压缩机所获得的压比主要受频率、排出器位移(即扫气量)和冷端温度的影响。排出器位移越大,压比越高;冷端温度越低,压比越高。在现有实验条件下,热压缩机工作在3 Hz时能够获得较高压比,其中排出器位移为6.0 mm时,可以获得的最高压比为1.3。计算结果与实验结果的对比表明两者能够较好吻合。
The performance of thermal compressor for VM refrigerator in liquid helium temperature region was studied by means of simmlation and experiment. The experimental results indicate that the pressure ratio of thermal compressor without load is mainly influenced by frequency,displacement of displacer and the temperature. The pressure ratio increases with the increase of displacement of displacer and with the decrease of temperature. The pressure ratio reaches 1. 3 when the thermal compressor works at 3 Hz and the displacement of displacer is 6. 0 mm,the comparison results indicate that there is a good agreement between simulation and experimental results.
出处
《低温工程》
CAS
CSCD
北大核心
2015年第6期11-15,共5页
Cryogenics
基金
国家自然科学基金(No.51376187)
关键词
液氦温区
热压缩机
压比
频率
liquid helium temperature
thermal compressor
pressure ratio
frequency
