本文選題：金屬纖維　切入點(diǎn)：問(wèn)題描述　出處：《華中科技大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：金屬纖維燃燒器屬于多孔介質(zhì)燃燒技術(shù)的應(yīng)用裝置，比起傳統(tǒng)的自由擴(kuò)散火焰燃燒器，既具有污染物排放量小、燃燒強(qiáng)度高、回火安全性高的特點(diǎn)，還具有燃燒負(fù)荷范圍大、燃燒充分程度高、較低的熱慣性、良好的抗沖擊性等優(yōu)勢(shì)。此外，其排煙損失小、運(yùn)行噪音低，，符合當(dāng)今節(jié)能減排的需求。本文以金屬纖維燃燒器的技術(shù)原理為背景，運(yùn)用Fluent商用軟件對(duì)燃燒模擬進(jìn)行研究，形成了初步模型，得出了相應(yīng)模擬結(jié)果與分析結(jié)論。 （1）首先，對(duì)實(shí)際金屬纖維燃燒器的運(yùn)行原理、特點(diǎn)、優(yōu)勢(shì)進(jìn)行了詳盡描述，總結(jié)出了建模難點(diǎn)與依據(jù)，提出了單、雙排金屬絲模型設(shè)想。在既定物理模型上，用數(shù)值模型與邊界條件對(duì)其進(jìn)行約束，形成了完整的問(wèn)題描述，為數(shù)值求解算做好了準(zhǔn)備。 （2）對(duì)特定工況下的單、雙排金屬絲模型進(jìn)行了數(shù)值模擬，獲得了模型區(qū)域內(nèi)的冷、熱態(tài)氣體流動(dòng)規(guī)律，組分濃度分布，溫度分布等結(jié)果。結(jié)果表明，計(jì)算完成了對(duì)各控制方程和所設(shè)置邊界條件的表達(dá)。與此同時(shí)，結(jié)果反映出了一個(gè)問(wèn)題，那就是兩種模型燃燒反應(yīng)位置存在失真。 （3）針對(duì)模擬結(jié)果所反映的問(wèn)題，對(duì)模擬結(jié)果進(jìn)行了理論判斷與分析。從火焰?zhèn)鞑ヅc火焰穩(wěn)定機(jī)制，說(shuō)明模擬結(jié)果存在理論上的失真；通過(guò)多工況模擬結(jié)果的對(duì)比分析、數(shù)學(xué)控制模型內(nèi)核的剖析，得出導(dǎo)致模擬結(jié)果合理性差異的原因在于計(jì)算程序缺乏更為細(xì)致的數(shù)學(xué)控制方程的結(jié)論。
[Abstract]:Metal fiber burner belongs to the application device of porous media combustion technology. Compared with the traditional free diffusion flame burner, it has the characteristics of low pollutant emission, high combustion intensity, high tempering safety, and a wide range of combustion load. The advantages of high combustion adequacy, low thermal inertia, good impact resistance, and so on. In addition, its smoke loss is small, the running noise is low, and it meets the demand of energy saving and emission reduction. This paper takes the technical principle of metal fiber burner as the background. The combustion simulation is studied by Fluent commercial software, and a preliminary model is formed, and the corresponding simulation results and analysis conclusions are obtained. First of all, the operating principle, characteristics and advantages of the actual metal fiber burner are described in detail, the difficulties and basis of modeling are summarized, and the model assumption of single and double rows of wire is put forward. The numerical model and boundary conditions are used to constrain the problem, and a complete problem description is formed, which is ready for numerical calculation. (2) numerical simulation of single and double row wire model under specific working conditions is carried out, and the results of cold and hot gas flow, component concentration distribution and temperature distribution in the region of the model are obtained. The equations of control and the boundary conditions are expressed. At the same time, the results reflect the problem that there is distortion in the combustion reaction positions of the two models. 3) aiming at the problems reflected by the simulation results, the theoretical judgment and analysis of the simulation results are made. From the mechanism of flame propagation and flame stabilization, the theoretical distortion of the simulation results is explained. By analyzing the kernel of the mathematical control model, it is concluded that the reason for the difference in the rationality of the simulation results lies in the lack of more detailed mathematical control equations in the calculation program.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU996.7

【相似文獻(xiàn)】

相關(guān)期刊論文 前6條

1 金志剛,孟紅,金國(guó)強(qiáng),吳旭;開(kāi)發(fā)金屬纖維燃燒器——提高天然氣應(yīng)用技術(shù)[J];城市管理與科技;2002年04期

2 黃志甲,張旭,胡國(guó)祥;金屬纖維燃燒器在中餐燃?xì)獬床嗽畹膽?yīng)用[J];煤氣與熱力;2003年03期

3 要大榮,傅忠誠(chéng),潘樹(shù)源,艾效逸;金屬纖維燃燒器的燃燒特性研究[J];煤氣與熱力;2005年10期

4 王振興;廖雄;楊俊杰;;全預(yù)混金屬纖維燃燒器的研究[J];煤氣與熱力;2011年06期

5 仇中柱,李們;金屬纖維燃燒器及其頭部阻力特性分析[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年02期

6 ;[J];;年期

相關(guān)碩士學(xué)位論文 前3條

1 文習(xí)之;金屬纖維燃燒器的數(shù)值模擬研究[D];華中科技大學(xué);2014年

2 崔玉周;金屬纖維燃燒器頭部特性數(shù)值模擬與分析[D];華中科技大學(xué);2006年

3 陶冶;金屬纖維燃燒器燃燒低濃度煤層氣的數(shù)值模擬[D];重慶大學(xué);2014年

本文編號(hào)：1619033