Dimensionless correlations of frost properties on a cold cylinder surface
Dimensionless correlations of frost properties on a cold cylinder surface
复制标题
DOI：
10.1016/j.ijheatmasstransfer.2008.01.007
复制
发表时间：
2008-07
影响因子：
5.2
通讯作者：
Jung soo Kim;Dong-Keun Yang;Kwan-Soo Lee
中科院分区：
文献类型：
--
作者：
Jung soo Kim;Dong-Keun Yang;Kwan-Soo Lee
我们提出了无量纲的相关性，在冷缸表面上的结霜性能。结霜实验进行，同时改变各种结霜参数，如空气温度，冷缸表面温度，空气流速，和绝对湿度。实验数据表明，在高风速下，圆柱体周围形成了均匀的霜层。的厚度，密度和表面温度的霜层，和传热系数的无量纲相关性得到的雷诺数，傅立叶数，绝对湿度和无量纲温度的函数。这些关联式的适用范围为雷诺数700-3000（空气流速0.5-2.0m/s），傅立叶数56.8-295.7（操作时间0- 100 min），绝对湿度0.00280-0.00568kg/kga，空气温度3-9°C，冷缸表面温度−32-−20°C。提出的关联式与实验数据在15%的误差范围内一致。
We propose dimensionless correlations for frost properties on a cold cylinder surface. Frosting experiments were performed while changing various frosting parameters such as the air temperature, cold cylinder surface temperature, air velocity, and absolute humidity. The experimental data showed that a uniform frost layer grew around the circumference of the cylinder at a high air velocity. Dimensionless correlations for the thickness, density, and surface temperature of the frost layer, and for the heat transfer coefficient were obtained as functions of the Reynolds number, Fourier number, absolute humidity, and dimensionless temperature. The applicable ranges of these correlations are Reynolds number of 700–3000 (air velocities of 0.5–2.0m/s), Fourier number of 56.8–295.7 (operating time of 0–100min), absolute humidity of 0.00280–0.00568kg/kga, air temperatures of 3–9°C, and cold cylinder surface temperatures of −32 to −20°C. The proposed correlations agreed with the experimental data within an error of 15%.