超声波对蔗糖溶液中树枝冰晶生长速度的影响

Effect of Ultrasound on the Growth Velocity of Dendritic Ice in Sucrose Solution

为了阐明超声波抑制冰晶生长的机理,运用自制的超声波冷却实验台分别研究了超声波对脱气蔗糖稀溶液与未脱气蔗糖稀溶液中树枝冰晶生长的影响。结果显示:超声波对脱气蔗糖稀溶液与未脱气蔗糖稀溶液中树枝冰晶生长速度均有抑制作用,但未脱气蔗糖溶液中树枝冰晶的生长速度要大大低于脱气蔗糖溶液中树枝冰晶的生长速度。这表明超声波在溶液中引起的空化效应是抑制冰晶生长的主要因素。

In order to clarify the mechanism of ultrasound inhibition of dendritic ice growth, the effect of ultrasonic waves on the growth of dendritic ice in degassed sucrose solutions and untreated solutions were investigated. A novel ultrasonic cold stage device was applied in the detection. The results show that ultrasound could inhibit the growth of dendritic ice in both untreated and degassed sucrose solution. But the growth velocity of dendritic ice in untreated sucrose solution is much less than that in degassed solution. It is concluded that cavitation is the major factor for the inhibition of dendritic ice growth.