受热面上冰柱排的融化机理研究  

RESEARCH ON THE MELTING MECHANICS OF A ROW OF ICICLES ON THE HEATED SURFACE

作　　者：衣永海 李维仲 

机构地区：[1] Key Lab. of Ocean Energy Utilization and Energy Conservation of Ministry of Edu., Dalian Univ. of Tech., Dalian 116024, China

出　　处：《太阳能学报》2010年第6期723-726,共4页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50476074)

摘　　要：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。Melting characteristics of porous bone of snow or frost layer in the air were simulated with a row of icicle on the heated surface. The numerical simulation of the icicle-melting was implemented with the aid of computational fluid dynamics software FLUENT by the arithmetic of coupled heat transfer of liquid-solid interfaces, and the melting process is visualized. Simulations on icicle-melting under conditions of different heated temperature, horizontal air velocity and contact area of icicle and air were performed, and the melting time was obtained. The results showed that melting time decreased significantly with increasing temperature of the heated surface. Increasing the horizontal air velocity did not contribute to the icicle melting process, because the air temperature is just the icicle melting point. Increasing the contact area of icicle and air can speed up the icicle melting.

关 键 词：受热面 融化时间 机理研究 接触面积 水平风速 数值模拟 受热温度 空气 计算流体动力学 送风温度 融化特性 融化过程 耦合传热 流固界面 多孔骨架 定解条件 FLUENT 算法 速度 霜层 

分 类 号：TK511-55[动力工程及工程热物理—热能工程]