本文關(guān)鍵詞：無閘低壩樞紐引航道水流條件數(shù)值模擬　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 無閘低壩 引航道水流條件 數(shù)學(xué)模型 透空式導(dǎo)航墻

【摘要】：近年來，為解決一些河段內(nèi)泥沙、灌溉取水以及通航條件等問題，無閘低壩水利樞紐這一方案被越來越多的采用。無閘低壩水利樞紐主要作用是抬高上游水位、攔蓄泥沙，其特點(diǎn)主要在三個(gè)方面：泄洪道無閘門，水流過壩為自由溢流，來流量等于下泄流量；壩高小，小流量下尚能形成庫，大流量下作用更類似于潛壩；規(guī)模較小，船閘建筑物縮窄河道的比例較大，流量較大時(shí)來流受引航道頂托后口門區(qū)橫向流較強(qiáng)。因?yàn)樗@些特點(diǎn)使得其上游引航道水利條件復(fù)雜，對(duì)通航不利。因此，分析無閘低壩水利樞紐引航道水流條件復(fù)雜的成因并對(duì)改善措施進(jìn)行研究顯得非常必要。 本文在系統(tǒng)總結(jié)了各種引航道改善措施研究現(xiàn)狀及水流數(shù)學(xué)模型發(fā)展的基礎(chǔ)之上，根據(jù)福建閩江水口水電站壩下水位治理工程的實(shí)測(cè)地形、水文資料以及樞紐整體水工物理模型試驗(yàn)所得結(jié)果，建立了基于有限元法的能夠較為準(zhǔn)確地模擬復(fù)雜引航道邊界條件的平均水深二維水流數(shù)學(xué)模型對(duì)水口水電站壩下水位治理工程的引航道進(jìn)行改善研究。 本文的主要結(jié)論如下： ①通過將所建立的二維數(shù)學(xué)模型與水工物理模型實(shí)測(cè)資料的進(jìn)行對(duì)比驗(yàn)證，結(jié)果表明此數(shù)學(xué)模型得到的水位、流速及流向與實(shí)測(cè)資料較為接近，說明二維水流數(shù)學(xué)模型的建立、數(shù)值計(jì)算方法以及各參數(shù)的設(shè)定較為合理，，能夠較為準(zhǔn)確地模擬實(shí)際河道及引航道的水流。 ②針對(duì)引航道口門區(qū)橫向流速過大的問題，提出了引航道透空式導(dǎo)航墻邊界處理方法，能夠較好模擬透空式導(dǎo)航墻對(duì)引航道水流條件的改善情況。 ③通過對(duì)水口水電站壩下水位治理工程壩上河段進(jìn)行分析，總結(jié)歸納出致使其上游引航道水流條件復(fù)雜的原因。 ④通過數(shù)值模擬計(jì)算分析研究，提出了延長(zhǎng)隔流墻、增加帶不同底孔大小的導(dǎo)航墻、增加隔流墩等改善措施，使通航最大流量提升到12000m3/s。
[Abstract]:In recent years, in order to solve some problems such as sediment, irrigation and navigation conditions, the project of low dam without sluice is used more and more. The main function of low dam without sluice is to raise the upstream water level. The characteristics of sediment storage are mainly in three aspects: there is no gate in spillway, the flow of water through the dam is free overflow, the coming discharge is equal to the discharge; The dam height is small and the reservoir can be formed under the small discharge, and the action under the large discharge is more similar to that of the submersible dam. The scale is small, the proportion of the ship lock building narrows the river channel is larger, when the discharge is larger, the transverse flow in the entrance area after the top support of the approach channel is stronger, because of these characteristics, the water conservancy condition of the upstream approach channel is complicated. Therefore, it is necessary to analyze the complex causes of the flow conditions in the approach channel of the low dam water conservancy project without gates and to study the improvement measures. On the basis of systematically summarizing the research status of various approaches to improve waterway and the development of mathematical model of water flow, this paper bases on the measured topography of water level control project under dam of Fujian Minjiang River Hydropower Station. The hydrological data and the result of hydrophysical model test of the whole hydro-engineering of the hub. Based on finite element method (FEM), a 2-D mathematical model of average depth of water flow is established, which can simulate the boundary conditions of complex approach channel accurately to improve the approach channel of the water level control project under the dam of Shuikou Hydropower Station. The main conclusions of this paper are as follows: The results show that the water level, velocity and flow direction obtained by this mathematical model are close to the measured data. It shows that the establishment of two-dimensional flow mathematical model, the numerical calculation method and the setting of each parameter are more reasonable, which can accurately simulate the actual channel and approach channel flow. (2) aiming at the problem of excessive transverse velocity in the entrance area of the approach channel, a boundary treatment method for the permeable navigation wall of the approach channel is proposed, which can better simulate the improvement of the flow condition of the approach channel by the permeable navigation wall. Through the analysis of the water level control project under the dam of Shuikou Hydropower Station, the reasons for the complex flow conditions in the upstream approach channel are summarized. (4) through numerical simulation and analysis, it is proposed to extend the barrier wall, increase the navigation wall with different bottom hole sizes and increase the baffle piers, so as to increase the maximum navigable flow to 12 000 m3 / s.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U612.23

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王列,陳永奎;五強(qiáng)溪樞紐通航水流試驗(yàn)與實(shí)船通航調(diào)研[J];長(zhǎng)江科學(xué)院院報(bào);1998年03期

2 黃明海;黃國(guó)兵;;三峽工程引航道通航水流數(shù)值模擬應(yīng)用研究[J];湖北水力發(fā)電;2007年03期

3 謝鑒衡,魏良琰;河流泥沙數(shù)學(xué)模型的回顧與展望[J];泥沙研究;1987年03期

4 韓其為,何明民;水庫淤積與河床演變的(一維)數(shù)學(xué)模型[J];泥沙研究;1987年03期

5 張世奇;二維動(dòng)邊界潮流輸沙及河床變形計(jì)算[J];泥沙研究;1988年04期

6 周建軍;內(nèi)河船閘引航道尺度與通航水流條件的關(guān)系[J];人民長(zhǎng)江;1997年08期

7 徐小梅;王峰;;游埠樞紐下游引航道及口門區(qū)隔墻優(yōu)化數(shù)學(xué)模擬研究[J];人民珠江;2011年01期

8 陳晚華;劉翔松;陳濤;田忠;;昭化電航樞紐引航道數(shù)值計(jì)算[J];四川水力發(fā)電;2009年05期

9 平克軍,郝品正;湘江株洲航電樞紐平面布置的研究試驗(yàn)[J];水道港口;2002年01期

10 周華興,鄭寶友;船閘引航道口門區(qū)通航水流條件改善措施[J];水道港口;2002年02期

本文編號(hào)：1440911