| 赵顺安,廖内平,徐 铭.逆流式自然通风冷却塔二维数值模拟优化设计[J].水利学报,2003,34(10):0026-0031 |
| 逆流式自然通风冷却塔二维数值模拟优化设计 |
| Two dimensional optimal design of counter flow natural draught cooling tower |
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| DOI： |
| 中文关键词: 逆流塔 数值模拟 优化设计 热力计算 |
| 英文关键词: counter flow cooling tower numerical simulation optimized design 2-D axial symmetrical flow k-ε model |
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| 中文摘要: |
| 塔内气流运动在无风时为二维轴对称运动，而目前国内的冷却塔设计计算为一维计算方法，无法对冷却塔配风、配水进行优化设计。因此，建立二维冷却塔设计计算方法具有一定的意义。本文对气流运动采用雷诺时均方程，雷诺应力用k-ε双方程模型进行封闭，雨区热交换的雨滴当量直径采用已有的冷却塔雨区热力特性研究成果，建立起二维自然通风逆流式冷却塔设计计算模型。通过与原型观测资料对比，本文所提出的二维计算方法出塔水温的计算结果与原型相差小于0.1℃。结合某电厂工程设计实例，通过二维数值模拟计算，对塔内填料和配水进行优化布置，冷却塔出塔水温可降低0.52℃。 |
| 英文摘要: |
| The method for 2-D design of counter flow natural draught cooling tower is proposed. The axial symmetrical turbulent flow in the tower is discribed by the 2-D time averaged Reynolds equation. For numerical simulation of the flow the k-ε model is adopted and the equivalent rain drop diameter in the rain area is determined by experiment data. The predicted outlet temperature of the cooling tower designed by this method is in good agreement with prototype observation with difference less than 0.1℃. An example is given for demonstration of the proposed design method. By optimizing the arrangement of filling material and water distribution in the tower the outlet temperature is reduced by 0.52℃. |
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