当量油气比对内燃波转子燃烧特性的影响  

Influence of equivalence fuel/air ratio on combustion characteristics of internal combustion wave rotor

作　　者：李维[1] 李建中[1] 巩二磊[1] 张开晨 袁丽 LI Wei;LI Jianzhong;GONG Erlei;ZHANG Kaichen;YUAN Li(Key Laboratory of Aero-engine Thermal Environment and Structure,Ministry of Industry and Information Technology,College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;School of National Defense Engineering,the Army Engineering University of the Chinese People＇s Liberation Army,Nanjing 210007,China)

机构地区：[1]南京航空航天大学能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室,南京210016 [2]中国人民解放军陆军工程大学国防工程学院,南京210007

出　　处：《航空动力学报》2018年第9期2123-2128,共6页Journal of Aerospace Power

基　　金：江苏省研究生培养创新工程(KYLX-0299);国家自然科学基金(51476077)

摘　　要：为了研究当量油气比对内燃波转子燃烧特性的影响规律,采用控制变量法,保持内燃波转子转速、混气填充速度不变,通过调节燃料喷射体积流量改变混气的当量油气比。在不同的当量油气比下开展内燃波转子燃烧特性试验。试验结果表明:当量油气比对于内燃波转子燃烧过程影响很大,随着当量油气比的增加,内燃波转子获得的燃烧压力增益增大,在内燃波转子转速为900r/min、混气填充速度为6.741m/s、当量油气比为1.442时,6个工作循环内平均燃烧压力增益达到246.29%,火焰平均传播速度随当量油气比呈类似正态分布,在化学恰当比附近达到最大10.8m/s。当量油气比小于1时,两组工况下火焰锋面呈向下倾斜状传播,当量油气比大于1时,两组工况下火焰锋面呈向上倾斜状传播。In order to study the influence of equivalence fuel/air ratio on combustion characteristics of internal combustion wave rotor,the control variable method was used to keep the combustion wave rotor speed and gas filling speed constant by adjusting the fuel injection volume to change of equivalence fuel/air ratio.The experimental investigations on combustion characteristics of internal combustion wave rotor were conducted under different equivalence fuel/air ratios.The results showed that the equivalence fuel/air ratio had great influence on combustion process of internal combustion wave rotor.As the equivalence fuel/aird ratio increased,the combustion wave rotor obtaining combustion pressure gain in-creased.When the speed of the internal combustion wave rotor was 900 r/min,the gas filling speed was 6.741 m/s,and the equivalence fuel/air ratio was 1.442,the average combustion pressure gain of the six working cycles was up to 246.29%.The flame propagation velocity was similar to normal distribution with the change of equivalence fuel/air ratio,which reached a maximum 10.8 m/s around the stoichiometric ratio.Under the condition of equivalence fuel/air ratio less than 1,the flame front was inclined downward,and the flame front was inclined upward in the case of the equivalence fuel/air ratio was greater than 1.

关 键 词：内燃波转子 燃烧特性 当量油气比 高速摄影 离子探针 增压燃烧 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]