【摘要】 通过对重力场中脉冲管管内部的流体力学方程进行化简和无量纲化,提出了影响脉冲管制冷机重力特性的无量纲数(ρgl/pa),并对大冷量高频脉冲管的重力特性进行试验研究。试验结果表明:提高输入功率、减小惯性管的尺寸、减小充气压力、减小脉冲管的尺寸以及提高脉冲管制冷机的运行温区能够改变无量纲数(ρgl/pa)的各个参数从而减小无量纲数(ρgl/pa)的大小,进而减弱重力方向性的影响。更多还原

【Abstract】 A dimensionless number of(ρgl/pa) was obtained by simplifying and dimensionlessing the fluid equations inside the pulse tube in gravity field.An experimental investigation also was carried out on gravity effect in large capacity high frequency pulse tube cryocooler(PTC).The results show that increasing the input power and temperature of pulse tube,decreasing charge pressure,and decreasing the dimensions of inertant tube and pulse tube,all can decrease the dimensionless number of(ρgl/pa),and also wakens the gravity effect in PTC.更多还原