变态对河工模型中弯道水流相似性的影响  

Effect of the distortion ratio on flow similarity in the physical model

作　　者：胡艳芬[1] 余明辉[2] 吴卫民[2] 

机构地区：[1]中国地质大学环境学院,湖北武汉430074 [2]武汉大学水利水电学院,湖北武汉430072

出　　处：《水科学进展》2007年第1期63-67,共5页Advances in Water Science

摘　　要：河工模型采用变态模型,其相似性会受到影响。采用平面二维模型,在数学模型的基础上,计算变率使河工模型弯道水流在相似性上产生的影响。在河工模型的条件下,选取不同变态模型,对环流进行了计算,研究了变率对弯道水流的相似的影响,并给出了初步分析。最后得出结论为在变态的河工模型中,弯道的水流动力轴线在弯顶附近会变缓,而且横向水面比降会减小。A 2-D mathematical model is applied in the paper. By the calculating of the distorted models and the undistorted model of the eircumfluenee, the effect of the distortion ration on the flow is analyzed. The flow dynamic axis in the distorted models is smoother than that in the undistorted model, while the flow horizontal gradient in the distortion model is smaller than that in the undistorted model. The results of the elementary analyses are provided.

关 键 词：河工模型 平面二维模型 变率 水流相似 弯道 

分 类 号：TV131.612[水利工程—水力学及河流动力学]