本文選題：SWAN　切入點(diǎn)：擴(kuò)展的雙曲型緩坡方程　出處：《杭州電子科技大學(xué)》2014年碩士論文

【摘要】：近岸波浪傳播變形的模擬是水動(dòng)力學(xué)研究的一項(xiàng)重要內(nèi)容，而風(fēng)生波浪往往是其最基本的產(chǎn)生形式。波浪的風(fēng)生機(jī)制仍未得到有效解決，近岸波浪傳播變形的模擬也涉及到大量動(dòng)力機(jī)制，十分復(fù)雜。風(fēng)生波浪的數(shù)值模擬問(wèn)題含以上兩方面的難點(diǎn)，需結(jié)合多個(gè)波浪模型方可進(jìn)行有效求解。SWAN模型在刻畫波浪風(fēng)生機(jī)制及波-波相互作用方面優(yōu)勢(shì)明顯；本文建立的擴(kuò)展雙曲型緩坡方程在描述波浪在復(fù)雜地形上的傳播變形問(wèn)題時(shí)不僅可以考慮波浪的聯(lián)合折射、繞射、反射和淺化效應(yīng)，而且能夠通過(guò)添加的修正項(xiàng)計(jì)及水底快速變化地形的二階因子的影響、波浪非線性色散效應(yīng)、風(fēng)能輸入、底摩阻耗散和波浪破碎耗散。因此，對(duì)于風(fēng)起主導(dǎo)作用地形上波浪的傳播變形問(wèn)題，聯(lián)合以上兩個(gè)波浪模型，，使之既能精確考慮波浪的風(fēng)生機(jī)制又能反映出近岸復(fù)雜地形和建筑物的影響。 本文首先從流體力學(xué)理論出發(fā)回顧了風(fēng)生波浪問(wèn)題的由來(lái)，闡述風(fēng)生波浪數(shù)值模擬的兩大難題（風(fēng)生機(jī)制和傳播變形）及其各自數(shù)學(xué)模型的發(fā)展，尤其是CFD的出現(xiàn)給問(wèn)題的求解帶來(lái)了便利條件。通過(guò)分析各個(gè)波浪數(shù)值模擬模型的優(yōu)缺點(diǎn)，第二部分給出了緩坡方程和SWAN模型的詳細(xì)說(shuō)明。Berkhoff緩坡方程為一橢圓型方程，能夠刻畫波浪聯(lián)合折射、繞射、反射作用，經(jīng)過(guò)擴(kuò)展已能夠考慮更多的動(dòng)力機(jī)制，經(jīng)過(guò)改進(jìn)發(fā)展出拋物型緩坡方程與雙曲型形緩坡方程。基于動(dòng)譜平衡方程的SWAN模型，以源匯項(xiàng)線性疊加的方式來(lái)考慮各種物理機(jī)制，對(duì)風(fēng)生機(jī)制處理上比較精確。本文第三部分在考慮流作用的緩坡方程基礎(chǔ)上，建立了一個(gè)擴(kuò)展的雙曲型緩坡方程，給出了具體的邊界條件，提出了ADI格式與C-N格式相結(jié)合的數(shù)值求解方法。針對(duì)輻射邊界條件中波向不確定問(wèn)題，給出了沿空間推進(jìn)的麥考馬克（MacCorMack）預(yù)估-校正的方法來(lái)求解波數(shù)矢無(wú)旋方程，從而得到計(jì)算域內(nèi)波向。第四部分選用了四個(gè)典型試驗(yàn)地形對(duì)該擴(kuò)展方程的適用性進(jìn)行了驗(yàn)證，給出了原雙曲型方程、擴(kuò)展方程的計(jì)算結(jié)果與試驗(yàn)值之間的對(duì)比，證明了本擴(kuò)展模型的有效性。對(duì)于風(fēng)生波浪的數(shù)值模擬，第五部分我們給出了一個(gè)SWAN自嵌套和擴(kuò)展雙曲型緩坡方程聯(lián)合使用的方案，綜合利用了SWAN在刻畫風(fēng)生機(jī)制和波-波作用上的合理性和擴(kuò)展模型在描述波浪傳播變形方面的固有優(yōu)勢(shì)。
[Abstract]:Simulation of wave propagation and deformation near shore is an important part of hydrodynamic research, and wind-induced wave is often the most basic form of wave generation. The wind-induced mechanism of wave has not been solved effectively. The simulation of wave propagation and deformation near shore also involves a large number of dynamic mechanisms and is very complicated. The numerical simulation of wind-induced waves involves the difficulties mentioned above. In order to solve the SWAN model effectively, it is necessary to combine several wave models in order to describe the wind-induced mechanism and wave-wave interaction. The extended hyperbolic gentle slope equation in this paper can not only consider the joint refraction, diffraction, reflection and shallowness of waves in describing the propagation and deformation of waves on complex terrain. Furthermore, it is possible to take into account the influence of second-order factors of rapidly changing topography under the water bottom, wave nonlinear dispersion effect, wind energy input, bottom friction dissipation and wave breaking dissipation by adding correction items. For the problem of wave propagation and deformation in the dominant terrain, the above two wave models are combined to accurately consider the wind-induced mechanism of waves and to reflect the influence of complex landforms and buildings on the shore. In this paper, the origin of wind-induced wave problem is reviewed based on the theory of hydrodynamics, and the development of two difficult problems (wind-induced mechanism and propagation deformation) and their respective mathematical models are expounded. Especially, the appearance of CFD brings convenience to the solution of the problem. By analyzing the advantages and disadvantages of each wave numerical simulation model, the second part gives the detailed description of the gentle slope equation and the SWAN model. The Berkhoff gentle slope equation is an elliptic equation. It can depict the combined refraction, diffraction and reflection of waves. By extension, it has been able to take into account more dynamic mechanisms, and the parabolic gentle slope equation and hyperbolic gentle slope equation have been developed through improvement. The SWAN model based on the dynamic spectrum equilibrium equation has been developed. In the third part of this paper, an extended hyperbolic gentle slope equation is established on the basis of the gentle slope equation considering the flow action. In this paper, the concrete boundary conditions are given, and a numerical solution method combining ADI scheme and C-N scheme is proposed. In this paper, a method of predictor-correction of MacCorMack-Propulsion along the space is presented to solve the wavenumber vector equations, and the wave directions in the domain are obtained. In the fourth part, the applicability of the extended equation is verified by the selection of four typical experimental terrain. The comparison between the calculated results of the original hyperbolic equation and the experimental data proves the validity of the extended model. In the fifth part, we give a scheme of SWAN self-nesting and extended hyperbolic gentle slope equation. The rationality of SWAN in describing wind-induced mechanism and wave-wave interaction and the inherent advantages of the extended model in describing wave propagation and deformation are comprehensively utilized.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P731.22

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王志 ,黃榮華;螺旋進(jìn)氣道CAD/CFD優(yōu)化設(shè)計(jì)方法的研究[J];小型內(nèi)燃機(jī)與摩托車;2003年02期

2 袁新,林智榮,賴宇陽(yáng),陳志鵬;透平葉片的氣動(dòng)優(yōu)化設(shè)計(jì)系統(tǒng)[J];熱力透平;2004年01期

3 趙福云,湯廣發(fā),劉娣,劉志強(qiáng),王漢青;CFD數(shù)值模擬的系統(tǒng)誤差反饋及其實(shí)現(xiàn)[J];暖通空調(diào);2004年06期

4 尹艷山,張軍,盛昌棟,袁建偉;CFD在堿回收鍋爐改造中的應(yīng)用[J];工業(yè)鍋爐;2005年04期

5 毛君;張利蓉;丁飛;李蕾;;基于FLUENT的葉輪機(jī)械內(nèi)部流場(chǎng)模擬研究[J];煤礦機(jī)械;2006年08期

6 郭劉洋;杜明剛;李吉元;;液力變矩器的流場(chǎng)數(shù)值模擬及試驗(yàn)對(duì)比[J];工程機(jī)械;2009年02期

7 鄭發(fā)平;宋文武;周乾海;張雪峰;;基于CFD燈泡混流式水輪機(jī)轉(zhuǎn)輪水力設(shè)計(jì)的研究[J];攀枝花學(xué)院學(xué)報(bào);2009年03期

8 程光田;劉元義;顏世周;;CFD技術(shù)在低比轉(zhuǎn)速離心泵中的應(yīng)用[J];機(jī)械工程與自動(dòng)化;2009年05期

9 張涵信;查俊;;關(guān)于CFD驗(yàn)證確認(rèn)中的不確定度和真值估算[J];空氣動(dòng)力學(xué)學(xué)報(bào);2010年01期

10 潘冬玲;劉義軍;;空調(diào)用軸流風(fēng)機(jī)內(nèi)部流場(chǎng)CFD數(shù)值模擬研究[J];煤炭技術(shù);2010年06期

相關(guān)會(huì)議論文 前10條

1 趙連會(huì);羅劍楓;黃志慧;;某型壓氣機(jī)三維CFD計(jì)算分析[A];中國(guó)動(dòng)力工程學(xué)會(huì)透平專業(yè)委員會(huì)2010年學(xué)術(shù)研討會(huì)論文集[C];2010年

2 陳君;代洪浪;李治友;;CFD在轉(zhuǎn)爐二次除塵系統(tǒng)設(shè)計(jì)中的應(yīng)用[A];第5屆中國(guó)金屬學(xué)會(huì)青年學(xué)術(shù)年會(huì)論文集[C];2010年

3 王金鋒;謝晶;;基于CFD技術(shù)的冷藏車優(yōu)化設(shè)計(jì)[A];上海市制冷學(xué)會(huì)2009年學(xué)術(shù)年會(huì)論文集[C];2009年

4 黃龍?zhí)?;基于CFD的飛艇氣囊氣動(dòng)外形優(yōu)化研究[A];2011年中國(guó)浮空器大會(huì)論文集[C];2011年

5 朱家亮;張濤;韋朝海;馮春華;;基于CFD的內(nèi)循環(huán)流化床流場(chǎng)結(jié)構(gòu)分析及優(yōu)化設(shè)計(jì)[A];第六屆全國(guó)環(huán)境化學(xué)大會(huì)暨環(huán)境科學(xué)儀器與分析儀器展覽會(huì)摘要集[C];2011年

6 孫春耕;羅t

本文編號(hào)：1671435