發(fā)布時(shí)間：2018-03-11 10:13

  本文選題：氫氣　切入點(diǎn)：湍流預(yù)混燃燒　出處：《北京交通大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：石油資源的日益匱乏與汽車行業(yè)的迫切能源需求之問的矛盾已成為影響社會(huì)經(jīng)濟(jì)可持續(xù)發(fā)展的重要問題,“開源”——尋找新型可替代能源和“節(jié)流”——提高能源使用效率并行對(duì)促進(jìn)經(jīng)濟(jì)的較快發(fā)展起著十分重要的作用。本研究以內(nèi)燃機(jī)替代燃料的湍流燃燒基礎(chǔ)機(jī)理研究為前提,針對(duì)實(shí)驗(yàn)系統(tǒng)存在的湍流分布均勻性較低、系統(tǒng)耐壓不高、試驗(yàn)對(duì)象單一、系統(tǒng)可控變量少等問題,首先以定容湍流燃燒實(shí)驗(yàn)系統(tǒng)的總體設(shè)計(jì)為主要內(nèi)容,依次對(duì)系統(tǒng)的總體設(shè)計(jì)方案、定容燃燒彈、配氣系統(tǒng)以及數(shù)據(jù)采集系統(tǒng)等子系統(tǒng)的設(shè)計(jì)思路、結(jié)構(gòu)組成、關(guān)鍵參數(shù)計(jì)算等方面展開詳實(shí)的論證和評(píng)估。其次,在彈體密封上,設(shè)計(jì)雙端蓋密封結(jié)構(gòu)實(shí)現(xiàn)燃燒腔室的有效密封及石英玻璃的便捷拆裝：在彈體結(jié)構(gòu)上,重點(diǎn)對(duì)定容彈本體、石英玻璃和固定螺栓進(jìn)行設(shè)計(jì)和校核,確保實(shí)驗(yàn)系統(tǒng)的可靠性。此外,為消除氣路容積對(duì)預(yù)混合氣當(dāng)量比的影響,設(shè)計(jì)了獨(dú)立進(jìn)氣系統(tǒng)；對(duì)數(shù)據(jù)采集系統(tǒng)而言,設(shè)計(jì)并搭建了燃燒壓力采集子模塊,并采用紋影法和高速攝影儀配合使用的方式實(shí)現(xiàn)湍流燃燒火焰的采集。同時(shí),以定容燃燒腔室內(nèi)湍流氛圍的營(yíng)造為研究?jī)?nèi)容,以多種湍流營(yíng)造方法的對(duì)比分析為基礎(chǔ),結(jié)合研究目的和工程實(shí)際,設(shè)計(jì)“會(huì)字塔”型風(fēng)扇布局,以風(fēng)扇擾動(dòng)作為燃燒腔室內(nèi)預(yù)混合氣湍流流動(dòng)的動(dòng)力來源,采用風(fēng)扇前端的孔板罩將風(fēng)扇旋轉(zhuǎn)形成的有序旋流轉(zhuǎn)變?yōu)榭臻g射流,多束射流在燃燒腔室中心區(qū)域碰撞形成無(wú)序的湍流流動(dòng),實(shí)現(xiàn)真正意義上的湍流氛圍。此外,針對(duì)火焰圖像數(shù)目多、火焰特征參數(shù)難以手工準(zhǔn)確獲取等問題,本研究基于MATLAB平臺(tái),編寫火焰圖像批處理算法,實(shí)現(xiàn)火焰圖像的讀取、火焰輪廓的檢測(cè)、特征參數(shù)的計(jì)算、結(jié)果報(bào)表的生成等功能,提高了試驗(yàn)圖像處理效率和精度。最后,以定容湍流燃燒試驗(yàn)平臺(tái)為依托,以湍流氛圍中氫——空預(yù)混火焰燃燒特性為研究?jī)?nèi)容,重點(diǎn)開展了初始湍流強(qiáng)度、初始湍流尺度、初始?xì)怏w壓力對(duì)火焰演變特性和傳播特性的影響規(guī)律,實(shí)現(xiàn)實(shí)驗(yàn)系統(tǒng)性能的全面檢測(cè)及火焰燃燒特性的研究。
[Abstract]:The contradiction between the increasingly scarce petroleum resources and the urgent energy demand of the automobile industry has become an important issue affecting the sustainable development of social economy. "Open Source"-to find new alternative energy sources and to "cut down"-to improve the efficiency of energy use. Rate parallelism plays a very important role in promoting the rapid development of economy. This study is based on the study of the basic mechanism of turbulent combustion of alternative fuels for internal combustion engines. Aiming at the problems of low uniformity of turbulence distribution, low pressure resistance, single test object and less controllable variables in the experimental system, the general design of the experimental system of constant volume turbulent combustion is taken as the main content. The whole design scheme of the system, the constant volume combustion bomb, the gas distribution system and the data acquisition system are discussed and evaluated in turn. Secondly, on the sealing of the projectile, the detailed argumentation and evaluation are carried out in the aspects of system design, structure composition, calculation of key parameters, and so on. The effective sealing of combustion chamber and the convenient disassembly of quartz glass are realized by the design of double end cover seal structure. In the structure of the projectile, the design and verification of the fixed volume bomb body, quartz glass and fixed bolt are emphasized. To ensure the reliability of the experimental system, an independent intake system is designed to eliminate the influence of the volume of the gas path on the premixed equivalent ratio. For the data acquisition system, the combustion pressure acquisition sub-module is designed and built. At the same time, the turbulent combustion flame collection is realized by using the schlieren method and the high speed photography instrument. At the same time, taking the building of turbulent atmosphere in the chamber of the constant volume combustion chamber as the research content, and based on the comparison and analysis of various turbulence construction methods, Combined with the purpose of the research and the engineering practice, the layout of the "Huizhi Tower" fan is designed, and the fan disturbance is used as the power source of the turbulent flow of the pre-mixed gas in the combustion chamber. The orifice plate cover of the front end of the fan is used to transform the ordered swirling flow formed by the fan into a space jet, and the multi-beam jet collides in the central region of the combustion chamber to form a disordered turbulent flow, which realizes the real turbulent atmosphere. Aiming at the problems such as the large number of flame images and the difficulty of obtaining the flame characteristic parameters by hand, this study is based on the MATLAB platform, compiles the flame image batch processing algorithm, realizes the flame image reading, the flame contour detection, the characteristic parameter calculation, and so on. Results the efficiency and accuracy of image processing were improved with the function of generating report forms. Finally, the combustion characteristics of hydrogen-air premixed flame in turbulent atmosphere were studied based on the constant volume turbulent combustion test platform. The effects of initial turbulence intensity, initial turbulence scale and initial gas pressure on flame evolution and propagation characteristics are emphasized.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U467.2

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孫明波;梁劍寒;王振國(guó);;湍流燃燒亞格子線性渦模型研究[J];燃燒科學(xué)與技術(shù);2007年02期

2 范周琴;孫明波;劉衛(wèi)東;;湍流燃燒的概率密度函數(shù)輸運(yùn)方程模型研究[J];飛航導(dǎo)彈;2010年05期

3 鄭楚光,余大江,米建春;密度脈動(dòng)的數(shù)學(xué)�；捌湓谕牧魅紵械膽�(yīng)用[J];武漢水利電力學(xué)院學(xué)報(bào);1989年04期

4 鄭楚光,余大江,米建春;密度脈動(dòng)的數(shù)學(xué)�；捌湓谕牧魅紵械膽�(yīng)用[J];化工學(xué)報(bào);1990年01期

5 周力行;湍流燃燒的新二階矩模型[J];工程熱物理學(xué)報(bào);1996年03期

6 陳興隆,周力行,張健;甲烷-空氣同軸突擴(kuò)湍流燃燒的新二階矩模型的數(shù)值模擬[J];工程熱物理學(xué)報(bào);1999年06期

7 周力行;胡礫元;王方;;湍流燃燒大渦模擬的最近研究進(jìn)展[J];工程熱物理學(xué)報(bào);2006年02期

8 王方;周力行;許春曉;張健;;湍流燃燒二階矩模型的大渦模擬驗(yàn)證[J];工程熱物理學(xué)報(bào);2006年05期

9 應(yīng)展烽;范寶春;陳志華;葉經(jīng)方;;沉浸邊界法在湍流燃燒中的應(yīng)用[J];自然科學(xué)進(jìn)展;2008年10期

10 孫兆國(guó);劉志勤;劉濤;劉敏賢;吳穎川;;湍流燃燒反應(yīng)數(shù)值模擬的研究與實(shí)現(xiàn)[J];計(jì)算機(jī)工程與設(shè)計(jì);2012年06期

相關(guān)會(huì)議論文 前2條

1 金捷;王方;;航空發(fā)動(dòng)機(jī)兩相湍流燃燒及其化學(xué)反應(yīng)特點(diǎn)[A];中國(guó)化學(xué)會(huì)第29屆學(xué)術(shù)年會(huì)摘要集——第41分會(huì)：燃料與燃燒化學(xué)[C];2014年

2 李應(yīng)林;楊偉航;徐勝利;;高精度格式在非光滑貼體網(wǎng)格計(jì)算中的初步應(yīng)用[A];第二屆爆轟與爆震發(fā)動(dòng)機(jī)研討會(huì)摘要集[C];2011年

相關(guān)博士學(xué)位論文 前1條

1 盧樹強(qiáng);超音速湍流燃燒的直接數(shù)值模擬研究[D];浙江大學(xué);2011年

相關(guān)碩士學(xué)位論文 前8條

1 周子航;定容湍流燃燒實(shí)驗(yàn)系統(tǒng)的研制[D];北京交通大學(xué);2016年

2 虞翔宇;值班火焰甲烷湍流燃燒過程（火用）特性研究[D];哈爾濱工業(yè)大學(xué);2016年

3 孫海俊;先進(jìn)旋渦燃燒室湍流燃燒流動(dòng)的特性研究[D];南昌航空大學(xué);2012年

4 俞吉;甲烷/空氣高壓對(duì)沖火焰的數(shù)值模擬及非預(yù)混湍流燃燒的初步研究[D];浙江大學(xué);2014年

5 王鵬;基于定容燃燒彈的湍流火焰燃燒分析[D];北京交通大學(xué);2012年

6 梁紅英;甲烷湍流射流燃燒系統(tǒng)氮氧化物模型的研究[D];天津大學(xué);2006年

7 唐鵬;煤油射流自動(dòng)著火的數(shù)值研究[D];中國(guó)科學(xué)技術(shù)大學(xué);2009年

8 陳銀;渦耗散概念燃燒模型耦合簡(jiǎn)化機(jī)理的多維數(shù)值模擬[D];中國(guó)科學(xué)技術(shù)大學(xué);2015年

，

本文編號(hào)：1597710