本文選題：水電站 + 挑流泄洪霧化��； 參考：《華北電力大學(xué)》2015年碩士論文

【摘要】：隨著一大批高壩的不斷建成,水電站泄洪霧化問題已經(jīng)越來越受到了人們的重視。目前利用數(shù)值模擬方法對泄洪霧化進(jìn)行預(yù)測已經(jīng)成為一種可行的方法。為此,本文主要以大壩挑流泄洪霧化為研究對象,利用中尺度大氣模式WRF和流體力學(xué)模擬軟件Meteodyn WT對水電站挑流泄洪霧化大壩下游風(fēng)速場進(jìn)行數(shù)值模擬,研究了在下游非均勻風(fēng)速場的影響下,風(fēng)速對泄洪霧化現(xiàn)象的影響,最終利用挑流霧化噴濺模型來研究泄洪霧化范圍和降雨強(qiáng)度。論文的主要內(nèi)容及成果如下：1.提出了應(yīng)用WRF-WT模擬壩下游非均勻風(fēng)場的方法。應(yīng)用中尺度大氣模式和流體動力學(xué)相結(jié)合的方法,研究壩下游非均勻風(fēng)場的特性,并利用該方法對漫灣水電站和李家峽水電站大壩下游風(fēng)速場進(jìn)行了數(shù)值模擬。2.提出了水滴隨機(jī)噴濺的改進(jìn)數(shù)學(xué)模型。首先對摻氣水舌的碰撞特性進(jìn)行了研究,重點探討了兩股水舌在空中碰撞特性。其次確定了挑流水舌的入水形狀和噴濺流量,完善了水滴隨機(jī)噴濺的數(shù)學(xué)模型。3.利用李家峽和漫灣水電站的原型觀測數(shù)據(jù),對漫灣水電站和李家峽水電站對水滴隨機(jī)噴濺數(shù)學(xué)模型進(jìn)行了驗證計算,驗證了水滴隨機(jī)噴濺數(shù)學(xué)模型,證明了水滴隨機(jī)噴濺數(shù)學(xué)模型在實際工程中的實用性和可靠性。
[Abstract]:With the continuous construction of a large number of high dams, the problem of flood discharge atomization of hydropower stations has been paid more and more attention. At present, numerical simulation method has become a feasible method to predict flood discharge atomization. Therefore, in this paper, the wind velocity field downstream of the dam spillway atomization dam is numerically simulated by using mesoscale atmospheric model WRF and hydrodynamic simulation software Meteodyn WT. The effect of wind speed on the atomization of flood discharge was studied under the influence of the inhomogeneous wind velocity field in the downstream. Finally, the spray model of jet atomization was used to study the atomization range of flood discharge and the intensity of rainfall. The main contents and results of the thesis are as follows: 1. A method for simulating the inhomogeneous wind field downstream of a dam with WRF-WT is presented. The characteristics of the inhomogeneous wind field in the lower reaches of the dam are studied by using the mesoscale atmospheric model and hydrodynamic method. The numerical simulation of the wind velocity field downstream of the dam of Manwan Hydropower Station and Lijiaxia Hydropower Station is carried out by using this method. An improved mathematical model for the random splash of water droplets is presented. Firstly, the collision characteristics of aerated water tongue are studied, and the collision characteristics of two jets of water tongue in the air are discussed. Secondly, the shape and flow rate of the splattering tongue are determined, and the mathematical model of random splash of water droplets is improved. Based on the prototype observation data of Lijiaxia and Manwan Hydropower stations, the mathematical models of random splash of water droplets in Manwan Hydropower Station and Lijiaxia Hydropower Station are verified and calculated. The practicability and reliability of the mathematical model of water droplet random splashing in practical engineering are proved.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TV135.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 苑海燕;杜繼穩(wěn);侯建忠;慕建利;;“神舟六號”飛船著陸時段主著陸場區(qū)風(fēng)場的數(shù)值模擬[J];氣象科學(xué);2008年01期

2 劉士和,曲波;泄洪霧化濺水區(qū)長度深化研究[J];武漢大學(xué)學(xué)報(工學(xué)版);2003年05期

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本文編號：1846683