基于气体多方过程的数字化实验仪

Digital experimental instrument based on polytropic processes of gas

设计并搭建基于多方过程的数字化实验仪,以空气为工质,通过控制步进电机推进过程,压缩气缸内气体,实现多种热力学过程.测量典型的多方过程的状态变化,获得气体物质的量、体积和压强及系统的散热系数,从而验证该实验仪可实现指定指数的多方过程.

The digital experimental instrument based on polytropic processes was designed and built.By using air as the working medium and compressing the gas in the cylinder through controlling the propulsion process of the stepper motor,the variety of thermodynamic processes were realized.The changes of states of several typical polytropic processes were measured to obtain thermodynamic quantities,including the number of moles,volume,and pressure of the gas and the heat dissipation coefficient of the system.It was verified that the polytropic process with a specified polytropic index could be achieved by the experimental instrument.