摘要：在工作冲程中,曲柄连杆机构在高温高压气体的推动下,将活塞所作的直线运动转变为曲轴、飞轮的旋转运动,即把燃油燃烧所产生的热能转变为曲轴、飞轮旋转的机械能。

摘要：The melting and solidification process of sodium nitrate, which is used as energy storage material, is studied in a vertical arranged energy storage device with two different bimetal finned tube designs (with and without additional lateral fins) for enhancing the heat transfer. The finned tube design consists of a plain steel tube while the material for the longitudinal (axial) fins is aluminum. The investigation analyses the influence of the lateral fins on the charging and discharging process. Three-dimensional transient numerical simulations are performed using the ANSYS Fluent 14.5 software. The results show that, every obstruction given by lateral fins reduces the melting and solidification velocity in direction to the outer shell.