基于热流耦合算法的大体积混凝土水管冷却仿真分析

发布时间：2018-07-04 07:03

本文选题：大体积混凝土 + 水管冷却　；参考：《西安理工大学学报》2017年03期

【摘要】：水管冷却是大体积混凝土最为有效、使用最为广泛的温控防裂措施,而水管参数对冷却效果影响显著。本文以某混凝土重力坝的4个浇筑层为研究对象,采用热流耦合算法,对影响水管冷却效果的主要参数进行定量分析。研究结果表明:通水水温由20℃减小至8℃过程中,水温每降低1℃,混凝土最高温度降低约0.30℃。通水流量从0.9m3/h增大至1.2m3/h过程中,流量每增加0.1m3/h,混凝土最高温度降低约0.33℃;通水流量从1.2m3/h增大至1.5m3/h过程中,流量每增加0.1m3/h,混凝土最高温度降低约0.28℃。水管间距小,通水水温低,通水流量大时冷却效果较好,采用双循环水管布置形式时冷却效果较好。实际工程中应综合考虑这些参数以确定最佳冷却方案。
[Abstract]:Water pipe cooling is the most effective mass concrete, the most widely used temperature control anti crack measures, and the water pipe parameters have a significant influence on the cooling effect. In this paper, 4 pouring layers of a concrete gravity dam are taken as the research object, and the heat flow coupling algorithm is used to quantitatively analyze the main parameters affecting the cooling effect of the water pipe. In the process of water and water temperature from 20 C to 8 C, the water temperature is reduced by 1 degrees centigrade, and the maximum temperature of concrete is reduced by about 0.30. The flow flux is increased from 0.9m3/h to 1.2m3/h, the flow rate increases by 0.1m3/h and the maximum temperature of concrete is reduced by about 0.33 degrees C; the flow rate is increased from 1.2m3/h to 1.5m3/h, and the flow rate increases to 0.1m3/h and the highest concrete temperature. The cooling effect is better when the water pipe is low, the water temperature is low, the water temperature is low and the water flow is large. The cooling effect is better when the double circulating water pipe arrangement is adopted. In practical engineering, the optimum cooling scheme should be considered synthetically in the actual project.
【作者单位】：西安理工大学水利水电学院;
【基金】：国家自然科学基金资助项目(51409207,51609200,51409208) 中国博士后科学基金资助项目(2015M582765XB) 西安理工大学科技创新计划资助项目(2016CX24)
【分类号】：TV544

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