本文選題：明渠 + 漸變段　； 參考：《長江科學院院報》2017年08期

【摘要】：明渠漸變段體型對漸變段中的水流形態(tài)有很大影響。為了解決明渠漸變段與下游水流的擴散銜接問題,消除明渠漸變段下游菱形沖擊波的影響,根據(jù)沖擊波特性和輻射水流基本關系,采用沖擊波簡化積分式,并考慮到漸變段水流與下游銜接,按劉韓生曲線邊墻窄縫挑坎計算方法算出明渠曲線漸變段邊墻體型,且該方法能夠計算漸變段中的水面線。試驗表明明渠曲線漸變段中水流平順穩(wěn)定且水面漸變升高。漸變段后水流正常,為均勻流,無菱形沖擊波的影響,故能夠解決水流擴散銜接的問題,該方法可以運用到明渠曲線漸變段邊墻體型設計中。
[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.
【作者單位】： 西北農林科技大學水利與建筑工程學院;
【分類號】：TV133

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