采用气旋耦合喷嘴的凹腔驻涡加力燃烧室点火性能研究  

Study on ignition performance of a cavity trapped vortex combustor of the afterburner with an air-blast-swirl atomizer

作　　者：翟云超 钟世林 康玉东 李洋 王金涛 ZHAI Yunchao;ZHONG Shilin;KANG Yudong;LI Yang;WANG Jintao(Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Chengdu 610500,China;Institute for Aero Engine,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500 [2]清华大学航空发动机研究院,北京100084

出　　处：《航空动力学报》2024年第12期236-245,共10页Journal of Aerospace Power

摘　　要：为了研究凹腔驻涡加力燃烧室的贫油点火特性,设计了一种出口为扁平状喇叭口的气旋耦合喷嘴,通过试验研究和数值仿真分析,获得了气旋耦合喷嘴的油雾锥角等特性和凹腔贫油点火特性。结果表明:气旋耦合喷嘴展向油雾锥角受气压和油压的影响较大,而径向油雾锥角基本不受影响、保持稳定。在内涵进气马赫数为0.53的条件下,凹腔在油气比0.00179下贫油点火成功;当外内涵压比为0.93时,凹腔内因不能形成理想涡系,不利于凹腔点火,其贫油点火油气比为0.00376;当外内涵压比不变时,增大进气压力,有利于凹腔贫油点火;电嘴插入深度对凹腔的点火性能影响较大,其插入深度需与气旋耦合喷嘴的径向油雾锥角匹配;凹腔前壁壁温数据可以作为凹腔点火是否成功的判据。In order to study the lean ignition characteristics of an air-blast-swirl atomizer in a cavity trapped vortex combustor of the afterburner,an air-blast-swirl atomizer with a flat bell mouth was designed.Through test research and numerical simulation analysis,the characteristics of spray cone angle and lean ignition of the air-blast-swirl atomizer were obtained.The results showed that the spanwise spray cone angle of the air-blast-swirl atomizer was greatly affected by air pressure and oil pressure,while the radial spray cone angle was basically unaffected and kept stable;under the condition of Mach number 0.53,the cavity trapped vortex combustor of the afterburner can successfully ignite with lean ignition at the fuel air ratio of 0.00179;when the inlet pressure ratio of out and inner bypass was 0.93,the ideal vortex system cannot be formed in the cavity,making it inconducive to the afterburner ignition;and the lean ignition fuel air ratio was 0.00376;if the inlet pressure ratio of out and inner bypass was constant,increasing the inlet pressure could be beneficial to lean ignition of the afterburner;the insertion depth of the igniter had a great influence on the ignition performance of the cavity,and its insertion depth was required to match the radial spray cone angle of the air-blast-swirl atomizer;the wall temperature data of the front wall of the cavity can be used as a criterion for the success of the cavity ignition.

关 键 词：凹腔驻涡加力燃烧室 气旋耦合喷嘴 油雾锥角 贫油点火 油气比 

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]