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挡水幕布是一种提高深水水库下泄低温水温度的结构,其受力研究对工程实施具有至关重要的作用。根据深水水库地形和总体布置,建立挡水幕布数值计算模型,应用FLUENT软件对流场、温度场及幕布受力进行数值模拟,并与模型试验进行对比。研究结果表明:挡水幕布实施后可提高下泄水温,流量越大,流态越不稳定,且幕布背流面负压区偏向电站一侧。距离电站越远、流量越大、过水高度越小,则幕布受力越大,水位变化对幕布受力影响不大,洪水时下放幕布是一种有效减小受力的方法。
The water curtain is a structure that can raise the temperature of the low temperature water discharged from deepwater reservoirs, and the study of its force is of vital importance to the project implementation. According to the topography and overall layout of Sham Shui Reservoir, a numerical model of water curtain was established. The numerical simulation of flow field, temperature field and curtain force was carried out by FLUENT software and compared with the model test. The results show that the water curtain can improve the discharge temperature after the curtain is put into operation. The larger the flow rate is, the more unstable the flow regime is. The farther away from the power plant, the larger the flow rate and the smaller the water height, the bigger the curtain force is, and the water level change has little effect on the curtain force. When the flood water is discharged, the curtain cloth is an effective method to reduce the force.