论文部分内容阅读
本文实验研究了低温受迫对流条件下空气参数对水平冷表面上液滴冻结的影响。冷表面温度分别为-15.5℃和-19.5℃,空气温度变化范围为-6～8.5℃,相对湿度变化范围为50%～80%,空气流速变化范围为1.0～9.0 m/s。结果表明,冷表面上液滴冻结的时间随冷面温度的升高而增加,随空气相对湿度的升高而减小。另外,空气温度和流速对冷表面液滴冻结也有较大的影响,随着空气温度和流速的增加,液滴冻结时间先减小后增大。
In this paper, the effects of air parameters on the freezing of droplets on horizontal cold surfaces under low temperature forced convection were experimentally studied. The cold surface temperatures are -15.5 ℃ and -19.5 ℃ respectively. The air temperature range is -6 ~ 8.5 ℃, the relative humidity range is 50% -80%, and the air velocity range is 1.0-9.0 m / s. The results show that the freezing time of droplets on the cold surface increases with the increase of cold surface temperature and decreases with the increase of air relative humidity. In addition, air temperature and flow rate have a greater impact on the freezing of droplets on the cold surface. With the increase of air temperature and flow rate, the freezing time of droplets first decreases and then increases.