中文摘要：

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。

英文摘要：

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.