發(fā)布時(shí)間：2018-01-06 13:30

  本文關(guān)鍵詞：Y型寬尾墩與消力池聯(lián)合消能水力特性研究　出處：《武漢大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 寬尾墩 消力池 聯(lián)合消能 數(shù)值模擬 水力特性

【摘要】：泄洪消能問(wèn)題一直是高壩樞紐布置的控制因素,將寬尾墩與消力池聯(lián)合運(yùn)用于高壩消能可兼具二者特點(diǎn),通過(guò)在閘后形成縱向拉高水舌增大摻氣,在反弧附近擴(kuò)散主流交匯碰撞形成三元水躍,不僅能提高傳統(tǒng)消能工的消能率,而且能縮短消力池長(zhǎng)度,減少投資,目前這種消能方式已運(yùn)用于我國(guó)較多工程中。對(duì)寬尾墩與消力池聯(lián)合消能水力特性進(jìn)行研究,具有一定的理論意義及工程運(yùn)用價(jià)值。本文在總結(jié)前人研究的基礎(chǔ)上,以某電站為依托,對(duì)寬尾墩和消力池聯(lián)合消能的三維流場(chǎng)進(jìn)行了數(shù)值模擬,探究了不同參數(shù)對(duì)聯(lián)合消能工水力特性的影響,結(jié)合模型試驗(yàn)數(shù)據(jù),對(duì)寬尾墩消能特性進(jìn)行了進(jìn)一步研究。主要的研究?jī)?nèi)容和成果有:(1)歸納總結(jié)了寬尾墩的發(fā)展及應(yīng)用情況,明確了寬尾墩各特征參數(shù)對(duì)其水流特性的影響,為研究提供了理論基礎(chǔ)和思路。并通過(guò)模型試驗(yàn)驗(yàn)證了所采用數(shù)值模型和計(jì)算方法的合理性。(2)定義了收縮比β,寬尾墩長(zhǎng)度l,上頂點(diǎn)與始折點(diǎn)高差h,及始折點(diǎn)與上縮點(diǎn)高差n四個(gè)參數(shù)變量,并設(shè)計(jì)了 12種寬尾墩體型。采用逐步收斂法,通過(guò)數(shù)值模擬研究了各參數(shù)變化時(shí),對(duì)流態(tài)、水面線、流速、壓力等水力參數(shù)的影響效果。在分析了寬尾墩水流特性變化規(guī)律的基礎(chǔ)上,推薦了優(yōu)化體型。(3)基于推薦體型進(jìn)行整體模型試驗(yàn),通過(guò)對(duì)不同工況的水力參數(shù)進(jìn)行分析,驗(yàn)證了該體型對(duì)本工程適用性良好,并進(jìn)一步研究了各水力參數(shù)的變化規(guī)律,深化了對(duì)該聯(lián)合消能工水力特性的認(rèn)識(shí)。
[Abstract]:The problem of flood discharge and energy dissipation has always been the control factor of the layout of the high dam hub. The combination of the wide tail pier and the stilling pool can have both characteristics and increase the aeration by forming a longitudinal water tongue behind the sluice. The three dimensional water jump formed by the collision of diffusion mainstream near the reverse arc can not only improve the energy dissipation rate of the traditional energy dissipators but also shorten the length of the stilling pool and reduce the investment. At present, this energy dissipation method has been used in many projects in China. The hydraulic characteristics of the combined energy dissipation of the wide tail pier and the stilling pool are studied. It has certain theoretical significance and engineering application value. On the basis of summarizing the previous studies, this paper numerically simulates the three-dimensional flow field of the combined energy dissipation of the wide tail pier and the stilling pool on the basis of a certain power station. The effects of different parameters on hydraulic characteristics of combined energy dissipators were investigated, and the model test data were combined. The energy dissipation characteristics of wide tail pier are further studied. The main research contents and results are as follows: 1) the development and application of wide tail pier are summarized, and the influence of characteristic parameters of wide tail pier on its flow characteristics is clarified. The theoretical basis and train of thought are provided for the study. The rationality of the numerical model and calculation method is verified by the model test. The contraction ratio 尾, the length of the wide tail pier, the height difference between the top vertex and the starting point h are defined. There are four parameter variables of the height difference between the starting point and the contraction point n, and 12 types of broad tail pier shapes are designed. The convection state, the surface line and the velocity of velocity are studied by numerical simulation when the parameters change by the method of gradual convergence. The effect of hydraulic parameters such as pressure. On the basis of analyzing the variation law of flow characteristics of wide tail pier, it is recommended to optimize the shape. 3) to carry out the overall model test based on the recommended shape. Through the analysis of hydraulic parameters under different working conditions, it is verified that this type has good applicability to the project, and the variation law of hydraulic parameters is further studied, and the understanding of hydraulic characteristics of the combined energy dissipator is deepened.
【學(xué)位授予單位】：武漢大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TV653;TV135.2

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本文編號(hào)：1388081