三峡库区航道疏浚泥沙悬浮扩散影响数值模拟研究

摘要

On the basis of building a three-dimensional transport and diffusion models by using FLUENT software ,it is built three-dimensional mathematical models under two construction programs on dredging in flood season and dry season for different dredging period .The range and concentration of suspended and diffusion for sediment under different construc-tion is simulated and predicted and it is found out the suspended and diffusion regularity of sediment under the two construc-tion programs;the influences of each construction programs on water -environment are analyzed and compared and it is found that dredging in dry season affects less than that of dredging in flood season .%在利用FLUENT软件建立三维输移扩散模型的基础上，针对不同疏浚期，构建了汛期疏浚、旱期疏浚两种施工方案下的三维数学模型；对不同施工方案下的泥沙悬浮扩散范围及浓度分布进行模拟预测，得出了2种方案下泥沙悬浮扩散规律；对各种施工方案下对施工区域水体环境的影响进行分析比较，发现旱期疏浚对水体环境的整体影响小于汛期疏浚。