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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。
Taking trapezoidal solar cell as the research object and Fluent 13.0 as the platform, the thermoelectric double diffusion model of the solar cell was established, and the two-dimensional unsteady numerical simulation of the trapezoidal solar cell was carried out. The validity of the model was verified from the temperature field and the flow field , Analysis of solar pool temperature changes, speed distribution and stability and other characteristics. The results show that the temperature in the trapezoidal tank is higher than that in the rectangular tank, and the maximum temperature difference is up to 5 ℃. The temperature in the same horizontal plane distributes regularly at both low and middle positions. The velocity circulation mainly occurs in the upper convection (UCZ) and lower convection (LCZ) There are two reverse large vortices in the LCZ after steady operation. There is a significant slip in the interface between the upper and the lower and the thickness of the UCZ and LCZ are thickening. So it is necessary to maintain the salt gradient in the solar pool.