CAJ | 학술논문

为增强燃烧的稳定性,提出了利用等离子体旋流器调控燃烧的新概念。等离子体旋流器由多对交错布置在燃烧器扩张段或喷嘴出口段上的电极组成,通过电离空气产生活性自由基,同时能够促进空气旋流,从而起到促进燃烧和增强燃烧稳定性作用。实验中利用平面激光诱导荧光测试系统观测到随着等离子激励功率的增强,火焰反应区逐步变宽,燃烧反应更加完全、稳定,研究表明,等离子体旋流器设计思路可行。分析了等离子体旋流器的优点,通过数值模拟研究了等离子体旋流器作用下的流场特点,将等离子体旋流器的作用机理归纳为旋流效应、化学效应和热效应。
위증강연소적은정성,제출료이용등리자체선류기조공연소적신개념。등리자체선류기유다대교착포치재연소기확장단혹분취출구단상적전겁조성,통과전리공기산생활성자유기,동시능구촉진공기선류,종이기도촉진연소화증강연소은정성작용。실험중이용평면격광유도형광측시계통관측도수착등리자격려공솔적증강,화염반응구축보변관,연소반응경가완전、은정,연구표명,등리자체선류기설계사로가행。분석료등리자체선류기적우점,통과수치모의연구료등리자체선류기작용하적류장특점,장등리자체선류기적작용궤리귀납위선류효응、화학효응화열효응。
The new concept of combustion control by the plasma swirler is presented.The plasma swirler with multiple staggered electrodes can be placed at the expansion section or the nozzle exit section of a combustor.The plasma swirler can enhance combustion stability by ionizing the air to produce active free radical and enhancing the air swirling.In the experiments,the flame response to the plasma swirler is examined with OH distribution by planar laser induced fluorescence system.The experimental results show that the flame reaction zone is broadened with the increase of the plasma exciting power,demonstrating that combustion is more sufficient and stable.The design of plasma swirler is feasible.Moreover,the advantages of the plasma swirler are presented,and the characteristics of the flow field with the plasma exciting are analyzed by numerical simulation.Generally,mechanisms of the plasma swirler combustion control are summarized as swirl effect,chemical effect and thermal effect.