明渠曲线渐变段体型求解新方法研究

发布时间：2018-04-29 03:25

本文选题：明渠 + 渐变段　；参考：《长江科学院院报》2017年08期

【摘要】：明渠渐变段体型对渐变段中的水流形态有很大影响。为了解决明渠渐变段与下游水流的扩散衔接问题,消除明渠渐变段下游菱形冲击波的影响,根据冲击波特性和辐射水流基本关系,采用冲击波简化积分式,并考虑到渐变段水流与下游衔接,按刘韩生曲线边墙窄缝挑坎计算方法算出明渠曲线渐变段边墙体型,且该方法能够计算渐变段中的水面线。试验表明明渠曲线渐变段中水流平顺稳定且水面渐变升高。渐变段后水流正常,为均匀流,无菱形冲击波的影响,故能够解决水流扩散衔接的问题,该方法可以运用到明渠曲线渐变段边墙体型设计中。
[Abstract]:The shape of the gradient section in the open channel has a great influence on the flow pattern in the gradient section. In order to solve the problem of diffusion connection between the gradual change section of the open channel and the downstream flow, and to eliminate the influence of the rhombic shock wave in the lower reaches of the open channel, a simplified integral formula of shock wave is adopted according to the characteristics of the shock wave and the basic relationship between the radiation flow and the shock wave. Considering the connection between the flow and the downstream of the gradient section, the shape of the side wall of the open channel curve is calculated according to the calculation method of Liu Hansheng curve wall narrow slit slit, and this method can calculate the water surface line in the gradient section. The experimental results show that the flow is smooth and steady and the water surface gradually increases in the open channel curve gradient section. The flow is normal after gradual change without the effect of rhombic shock wave so it can solve the problem of flow diffusion connection. This method can be applied to the design of sidewall shape of open channel curve.
【作者单位】：西北农林科技大学水利与建筑工程学院;
【分类号】：TV133

【相似文献】