以内陆某核电厂为例，简述了利用流体力学软件STAR-CCM＋模拟内陆核电厂厂区流场及大型自然通风冷却塔雾羽扩散的实现原理，介绍如何将SolidWorks2010建立的核电厂厂区模型导入到STAR-CCM＋，给出了STAR-CCM＋划分网格的过程和边界层划分的基本假定条件和参数。将STAR-CCM＋模拟的数据与风洞实验数据进行比较，结果显示了较好的一致性。结果表明：在离地面5nl的高度处，大型自然通风冷却塔背风面形成较大的空腔区，空腔区风速较小，只有1．0-1．5m／s，部分区域达到静风；冷却塔两侧风速相比入口速度增大了1．66倍；在离开地面100m的高空，冷却塔背风面的空腔区依然比较明显，冷却塔两侧风速相比入口风速，其变化趋于平稳；在沿主导风向的轴线上，冷却塔两侧风的扰动依次加强；单台冷却塔雾羽最大的抬升高度出现在下风向距离3300m处，最大抬升高度为690m；4台冷却塔雾羽在下风向距离3300m的抬升高度约为850m，是单台冷却塔的1．23倍。%The basic principle simulating wind field and plume drift of large scale natural draft cooling tower with a CFD software STAR-CCM ＋ was introduced by using an inland nuclear power plant as a case study. How to import the nuclear power plant model established by CAD software SolidWorks2010 into STAR-CCM ＋ was intro- duced, and a whole process of grid-creating and boundary setting was illustrated. The simulation value of STAR- CCM ＋ and the observational value of wind tunnel experiment were compared, and both were consistent. The re- sults indicate that there is a large cavity area behind the cooling tower at the height of 5 m above the ground. The wind speed of cavity area is only 1.0 - 1.5 m/s, and the wind is calm in part area. Side wind speed of cooling tower is 1.66 times of inlet wind speed. At the height of 100 m above the ground,the cavity area is still obvious, while the side wind speed of cooling tower becomes steady compared with inlet wind speed. The wind disturbance phenomenon in cooling tower sides strengthens along the dominant wind direction. The maximum plume rising height of a single cooling tower reaches 690 m at the distance of 3300 m downwind, while that of four cooling towers is 850 m and it is about 1.23 times of a single cooling tower.
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