本文選題：丁壩 + 局部沖刷　； 參考：《水動力學(xué)研究與進展(A輯)》2017年01期

【摘要】：精確模擬丁壩附近流場信息,預(yù)測沖刷形態(tài)對丁壩的設(shè)計和安全運行具有重要的意義。本文采用一種基于多相流模式的懸移質(zhì)輸沙與傳統(tǒng)推移質(zhì)輸沙相結(jié)合的模型模擬丁壩局部流場與沖刷過程,而河床變形則通過填充層體積份數(shù)的變化來模擬,VOF法處理自由面。泥沙沖刷侵蝕模型主要分為三個模塊:懸移質(zhì)漂流模塊、泥沙挾帶模塊以及推移質(zhì)輸運模塊,通過模擬在水流作用下的泥沙運動來預(yù)測泥沙侵蝕、對流擴散以及沉積等過程,同時考慮床面坡度對泥沙輸運以及臨界希爾茲數(shù)的影響。模擬得到了丁壩附近局部流場、地形沖淤變化以及沖刷坑形態(tài)等,并把計算結(jié)果與試驗資料進行了對比分析,二者吻合較好,證明該模型能夠很好地反映丁壩附近流場信息和床面變形特征。
[Abstract]:It is very important for the design and safe operation of the spur dike to accurately simulate the flow field information and predict the scour shape. In this paper, a model combining suspended sediment transport and traditional bed load transport based on multiphase flow model is used to simulate the local flow field and scour process of spur dikes, while the river bed deformation is simulated by the change of volume fraction of filling layer to simulate the treatment of free surface by VOF method. The sediment erosion model is divided into three modules: suspended drift module, sediment entrainment module and bed load transport module. Sediment erosion, convective diffusion and deposition are predicted by simulating sediment movement under the action of water flow. At the same time, the influence of bed slope on sediment transport and critical Shields number is considered. The local flow field, topographic erosion and deposition change and scour pit shape near the spur dike are obtained by simulation. The calculated results are compared with the experimental data and the results are in good agreement with each other. It is proved that the model can well reflect the information of flow field and deformation characteristics of bed surface near spur dike.
【作者單位】： 西安理工大學(xué)西北旱區(qū)生態(tài)水利工程國家重點實驗室培育基地;
【基金】：陜西省自然科學(xué)基礎(chǔ)研究計劃(2015JM5201) 國家自然科學(xué)基金(51579206)~~
【分類號】：TV863;TV135

【相似文獻】

相關(guān)期刊論文 前10條

1 毛昶熙;閘壩泄流局部沖刷問題(五)——粘性土的局部沖刷[J];人民黃河;1989年02期

2 毛昶熙;閘壩泄流局部沖刷問題(八)——局部沖刷公式綜述[J];人民黃河;1989年06期

3 高正榮;黃建維;趙曉冬;;大型橋梁鋼沉井下沉過程局部沖刷研究[J];海洋工程;2006年03期

4 韋雁機;葉銀燦;;床面上短圓柱體局部沖刷三維數(shù)值模擬[J];水動力學(xué)研究與進展A輯;2008年06期

5 張芝永;拾兵;范菲菲;阮雪景;;近床面水平圓柱局部沖刷二維數(shù)值模擬[J];計算力學(xué)學(xué)報;2012年05期

6 阿廷俾萊克;巴斯馬西;張永祿;;泄水建筑物下游局部沖刷[J];水利水運科技情報;1975年S2期

7 李保如;;水工建筑物下游河床局部沖刷的，

本文編號：1981199