【摘要】 等温活塞多孔介质和液体之间存在流动阻力，系统克服阻力做的功会抵消等温活塞由于增强换热而节省的能量，且这一现象表现出显著的转速依赖性。为了探究转速对等温活塞内部流动阻力以及压缩效率的影响规律，基于面心立方结构假设，建立流动阻力数学模型，定义等温活塞的节能率和系统压缩效率。通过分析转速对阻力的影响，综合评价等温活塞的节能性能。结果表明：随着转速的增加，阻力功的变化率也随之增加，阻力功占总功的比例逐渐增大，等温活塞压缩系统的节能率和效率逐渐下降；当压缩比为7、节能率为0时，等温活塞压缩系统的最高转速为650 r/min。更多还原

【Abstract】 There is a flow resistance between the porous medium and the liquid of the isothermal piston, and the work done by the system to overcome the resistance will offset the energy saved by the isothermal piston due to the enhanced heat exchange, and this phenomenon shows a significant speed dependence.In order to explore the influence of rotational speed on the internal flow resistance and compression efficiency of isothermal pistons, based on the assumption of a face-centered cubic structure, a mathematical model of flow resistance was established, and the energy-saving rate of the isothermal piston and the compression efficiency of the system were defined.The energy-saving performance of the isothermal piston was comprehensively evaluated by analyzing the effect of rotational speed on the resistance.The results show that as the rotational speed increases, the rate of change of resistance work also increases, the proportion of resistance work to total work gradually increases, and the energy-saving rate and efficiency of the isothermal piston compressor gradually decrease.When the compression ratio is 7 and the energy saving rate is 0,the maximum speed of the isothermal piston compressor system is 650 r/min.更多还原