基于二维数值模拟的梯形太阳池特性分析  

CHARACTERISTIC ANALYSIS OF A TRAPEZOIDAL SOLAR POND BASED ON TWO-DIMENSIONAL NUMERICAL SIMULATION

作　　者：刘宏升[1] 姜霖松 吴丹[1] 孙文策[1] 

机构地区：[1]大连理工大学海洋能源利用与节能教育部重点实验室,大连116024

出　　处：《太阳能学报》2017年第1期148-155,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51576029;51606176);中央高校基本科研业务费专项(DUT16QY19)

摘　　要：以梯形太阳池为研究对象,以Fluent 13.0为平台,建立太阳池热盐双扩散模型,对梯形太阳池进行二维非稳态数值模拟研究,从温度场和流场2个角度验证模型有效性,分析太阳池的温度变化、速度分布及稳定性等特性。结果表明:梯形池温度整体高于矩形池,最大温差可达5℃;同一水平面内温度以两侧低、中间高规律分布;速度环流主要发生在上层对流(UCZ)和下层对流(LCZ),稳定运行后LCZ内出现2个反向大涡旋;上、下交界面存在明显滑移,UCZ与LCZ的厚度存在增厚趋势,故对太阳池进行盐梯度维护是十分必要的。A thermal and salt diffusive mode was established for a trapezoidal salt gradient solar pond. Two-dimensional unsteady numerical simulation research was carried out basing on commercial software Fluent 13.0. The validity of the model was validated by analysis of temperature distribution and flow field, and the characteristic of the temperature, velocity distribution and the stability of the solar pond were disscussed. The result showed that the temperature of trapezoidal pond is higher than the rectangular pond, and the maximum temperature difference is up to 5 ℃. The temperature on the same horizontal plane reveals the temperature of middle is higher than that of side.The velocity circulation is mainly in the UCZ and the LCZ, two large eddies appear on the LCZ swirling in opposite direction. The upper and lower interface moving obviously, subsequently, the thickness of the UCZ and LCZ increase gradually, which indicates the regular maintenance for solar pond is necessary.

关 键 词：盐梯度太阳池 二维模型 双扩散 稳定性 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]