本文選題：微型渦噴發(fā)動機 + 蒸發(fā)管燃燒室��； 參考：《中國科學院研究生院(工程熱物理研究所)》2015年碩士論文

【摘要】：蒸發(fā)管燃燒室由于其供油壓力低、結(jié)構(gòu)簡單等優(yōu)點,已經(jīng)被廣泛應用到微型渦噴發(fā)動機上。但是對于該類燃燒室的貧油熄火極限的研究尚不完善,而貧油熄火極限是燃燒室的重要性能指標之一。因此本文通過試驗和數(shù)值模擬的手段對蒸發(fā)管燃燒室的貧油熄火極限展開了以下研究：1)研究了霧化對于貧油熄火的影響,采用旋流杯燃燒室,對其霧化進行分析,并結(jié)合霧化試驗結(jié)果改進了Lefebvre熄火經(jīng)驗公式,同時使用數(shù)值模擬手段分析燃燒室熄火點附近流場變化,得出了熄火點附近特征參數(shù)的變化規(guī)律。2)設(shè)計蒸發(fā)管試驗件,搭建蒸發(fā)管試驗臺,對蒸發(fā)管在不同工作狀態(tài)下的蒸發(fā)率進行了試驗研究,通過試驗得到了空氣流量、燃油流量和蒸發(fā)管管徑等參數(shù)對于蒸發(fā)率的影響。3)進行蒸發(fā)管燃燒室的常壓熄火試驗,得到了燃燒室的熄火極限,再通過數(shù)值模擬得到熄火狀態(tài)下蒸發(fā)管的空氣和燃油流量,結(jié)合蒸發(fā)率試驗得到熄火狀態(tài)下的蒸發(fā)率。將蒸發(fā)率作為參數(shù)加入到Lefebvre經(jīng)典熄火經(jīng)驗公式中,擬合得到適用于蒸發(fā)管燃燒室的熄火經(jīng)驗公式。4)通過蒸發(fā)管燃燒室熄火數(shù)據(jù)對得到的熄火經(jīng)驗公式進行了驗證,認為該經(jīng)驗公式具有一定的準確性。論文最后對全文工作進行了總結(jié),指出研究的缺點和不足,并提出了進一步改進的方向。
[Abstract]:The evaporative tube combustor has been widely used in micro turbojet engine because of its low fuel supply pressure and simple structure. However, the study on the limit of lean oil flameout of this kind of combustor is not perfect, which is one of the important performance indexes of the combustor. In this paper, by means of experiment and numerical simulation, the following research is carried out on the limit of lean oil flameout of evaporative tube combustor: 1) the influence of atomization on lean flameout is studied. The swirl cup combustor is used to analyze the atomization of the combustor. Combined with the atomization test results, the empirical formula of Lefebvre extinguishing is improved. At the same time, numerical simulation method is used to analyze the flow field change near the extinguishing point of the combustion chamber, and the variation law of characteristic parameters near the extinguishing point is obtained. 2) the evaporator tube test piece is designed. The evaporation rate of the evaporative tube in different working conditions was studied by setting up an evaporative tube test rig, and the air flow rate was obtained through the experiment. The influence of fuel flow rate and diameter of evaporator tube on evaporation rate. 3) the test of evaporative tube combustion chamber under atmospheric pressure is carried out, and the extinguishing limit of combustion chamber is obtained, and the air and fuel flow rate of evaporator tube under flameout state are obtained by numerical simulation. Combined with evaporation rate test, the evaporation rate under the condition of extinguishing is obtained. The evaporative rate is added to the Lefebvre's classical empirical formula of extinguishing, and the formula. 4) the empirical formula of extinguishment is verified by the data of evaporative tube combustion chamber. It is considered that the empirical formula has certain accuracy. Finally, the paper summarizes the work of the paper, points out the shortcomings and shortcomings of the research, and puts forward the direction of further improvement.
【學位授予單位】：中國科學院研究生院(工程熱物理研究所)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：V279;V231.2

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本文編號：1974451