本文選題：脈沖爆轟發(fā)動機 + 爆轟循環(huán)　； 參考：《北京交通大學》2015年碩士論文

【摘要】：脈沖爆轟發(fā)動機是一種新型熱力推進裝置,它是利用爆轟波后高溫高壓爆轟產(chǎn)物的膨脹產(chǎn)生推力,具有循環(huán)熱效率高、推重比大及結(jié)構(gòu)簡單等優(yōu)點,因此在未來飛行器的推進系統(tǒng)有廣闊的應用前景。然而脈沖爆轟發(fā)動機的工程應用還有許多關(guān)鍵技術(shù)沒有解決,因此本文通過數(shù)值計算和實驗模擬研究脈沖爆轟發(fā)動機爆轟循環(huán)中波的運動作用及其相互作用,理清了其工作循環(huán)的特點及規(guī)律,討論了爆轟管內(nèi)可燃混合物的充氣比例對爆轟循環(huán)的影響,研究了擴張噴管對其動力性能的影響,最后通過脈沖爆轟發(fā)動機裝置研究其點火及排氣過程的規(guī)律。 根據(jù)脈沖爆轟發(fā)動機工作循環(huán)的特點研究了其循環(huán)過程波系的產(chǎn)生、運動及相互作用等流場特征,從理論上分析了循環(huán)過程波系圖的變化以及推力的簡單計算。主要研究內(nèi)容如下： (1)由于對可燃混合氣的充入難以達到精確控制,在每次循環(huán)都不可能恰好充滿爆轟管,因此對爆轟管內(nèi)不同可燃混合氣的填充率進行了數(shù)值模擬,研究了爆轟管內(nèi)可燃混合物的填充比對其工作循環(huán)的影響,從而為發(fā)動機進氣的控制提供理論指導。 (2)為了研究噴管對脈沖爆轟發(fā)動機動力性能的影響,本文對不同形狀的擴張噴管進行了數(shù)值計算,研究其與等截面爆轟管產(chǎn)生的瞬時推力以及工作循環(huán)內(nèi)產(chǎn)生的沖量的差異。結(jié)果表明：在爆轟管尾部設(shè)置擴張噴管能明顯提高其動力性能。 (3)為了研究充氣壓力對脈沖爆轟發(fā)動機點火及爆轟產(chǎn)物排放過程的影響,本文采用高速紋影技術(shù)對爆轟的點火及爆轟產(chǎn)物的排放過程進行了可視化研究。實驗結(jié)果表明,隨著充氣壓力的提高,點火過程產(chǎn)生激波的強度和爆轟波在沖出爆轟管時的強度都隨之增強。
[Abstract]:Pulse detonation engine is a new type of thermal propulsion device. It uses the expansion of high temperature and high pressure detonation products after detonation wave to produce thrust. It has the advantages of high cycle heat efficiency, large push-weight ratio and simple structure. Therefore, it has a broad application prospect in the future aircraft propulsion system. However, the engineering application of pulsed detonation engine still has many key technologies to be solved. Therefore, the motion and interaction of waves in the detonation cycle of pulsed detonation engine are studied by numerical calculation and experimental simulation. The characteristics and laws of its working cycle are clarified, the effect of the inflatable ratio of combustible mixture in detonation tube on the detonation cycle is discussed, and the influence of expanded nozzle on its dynamic performance is studied. Finally, the ignition and exhaust process of pulsed detonation engine are studied. According to the characteristics of the working cycle of pulsed detonation engine, the characteristics of wave system generation, motion and interaction are studied. The variation of wave system diagram and the simple calculation of thrust are analyzed theoretically. The main contents of the study are as follows: 1) because it is difficult to control the filling of combustible mixture accurately, it is impossible to fill the detonation tube at every cycle, so the filling rate of different combustible mixture in the detonation tube is numerically simulated. The effect of filling ratio of combustible mixture in detonation tube on its working cycle is studied, which provides theoretical guidance for the control of engine intake. 2) in order to study the effect of nozzle on the dynamic performance of pulsed detonation engine, numerical calculation is carried out for different shapes of expanded nozzle, and the difference between the instantaneous thrust produced by the nozzle and the constant section detonation tube and the impulse produced in the working cycle is studied. The results show that the dynamic performance of the detonation tube can be improved obviously by setting the expanded nozzle at the end of the detonation tube. 3) in order to study the effect of inflatable pressure on ignition process and detonation product emission process of pulsed detonation engine, a visualization study on ignition and emission process of detonation products is carried out by using high speed schlieren technique in this paper. The experimental results show that the intensity of shock wave produced during ignition and the intensity of detonation wave when flushing out of detonation tube increases with the increase of inflatable pressure.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TK407

【參考文獻】

相關(guān)期刊論文 前10條

1 張群,嚴傳俊,范瑋,黃希橋;直徑對脈沖爆震發(fā)動機性能的影響[J];工程熱物理學報;2002年02期

2 張義寧;王家驊;范育新;李建中;張靖周;;供油時間改變對脈沖爆震發(fā)動機工作特性的影響[J];航空動力學報;2006年04期

3 張義寧;王家驊;劉鴻;張靖周;;多循環(huán)脈沖爆震發(fā)動機工作過程中的延遲時間研究[J];航空動力學報;2007年02期

4 張涵信;無波動、無自由參數(shù)的耗散差分格式[J];空氣動力學學報;1988年02期

5 俞鴻儒;氫氧燃燒及爆轟驅(qū)動激波管[J];力學學報;1999年04期

6 李旭東;王春;姜宗林;;噴管對脈沖爆轟發(fā)動機性能的影響[J];力學學報;2011年01期

7 李旭東;王愛峰;王春;姜宗林;;脈沖爆轟發(fā)動機的系統(tǒng)性能分析[J];力學學報;2010年03期

8 姜宗林;爆轟推進概念與機理研究——新型發(fā)動機研究的熱點[J];世界科技研究與發(fā)展;2001年04期

9 李輝煌,楊基明,徐立功;脈沖爆震發(fā)動機噴管流動的數(shù)值模擬[J];推進技術(shù);2004年06期

10 梁宗憲;楊基明;;擴張管和燃料部分填充對PDE效能的影響[J];推進技術(shù);2007年03期

，

本文編號：1837203