论文部分内容阅读
利用受热面上的一排冰柱来模仿雪或霜层的多孔骨架在空气中的融化特性。通过流固界面耦合传热算法,利用计算流体动力学(CFD)软件FLUENT对冰柱排融化过程进行了数值模拟。通过对冰柱排在不同受热温度、水平风速及冰柱与空气接触面积的情况下进行数值模拟,得到冰柱排在不同工况下的融化时间。结果表明:随底面受热温度的升高,融化时间有较为明显的缩短;水平风速(273K)的提高并没有明显地促进冰柱排的融化,主要是因为送风温度没有显著高于冰柱的熔点;当其它定解条件相同,在一定的冰柱与空气接触面积范围内,冰柱与空气的接触面积越大,其融化的速度也相对较快。
The use of a row of icicles on the heated surface to mimic the air-sea melting characteristics of the porous framework of snow or frost. Through the fluid-solid interface coupled heat transfer algorithm, the icicle melting process was numerically simulated by the computational fluid dynamics (CFD) software FLUENT. Through the numerical simulation of the row of icicles under different heating temperatures, horizontal wind speed and contact area between icicles and air, the melting time of icicles at different working conditions was obtained. The results show that the melting time is obviously shortened with the increase of the heating temperature of the bottom surface. The increase of the horizontal wind speed (273K) does not significantly promote the melting of the icicles, mainly because the temperature of the air supply is not significantly higher than that of the icicles Melting point. When the other conditions are the same, the contact area between the icicle and the air is larger within a certain contact area of the icicle with the air, and the melting speed of the icicle is relatively fast.