Active control of lifted diffusion flames with arrayed micro actuators
Active control of lifted diffusion flames with arrayed micro actuators
复制标题
DOI：
10.1007/s00348-005-0033-5
复制
发表时间：
2005-12-01
影响因子：
2.4
通讯作者：
Kasagi, N
中科院分区：
文献类型：
--
作者：
Kurimoto, N;Suzuki, Y;Kasagi, N
研究了同轴喷管火焰的主动控制。采用阵列式微襟翼作动器将扰动局部引入初始剪切层。大尺度涡环的脱落与襟翼运动的修改，和火焰特性，如起飞高度，吹出极限，和排放趋势，成功地操纵。借助PIV和PLIF技术研究了大尺度涡结构和燃料浓度的时空演化，以阐明其控制机制。研究发现，襟翼的驱动信号，近场涡结构显着修改和两种类型的具有不同的稳定机制的升力火焰实现。
Active control of a lifted flame issued from a coaxial nozzle is investigated. Arrayed micro flap actuators are employed to introduce disturbances locally into the initial shear layer. Shedding of large-scale vortex rings is modified with the flap motion, and the flame characteristics such as liftoff height, blowoff limit, and emission trend, are successfully manipulated. Spatio-temporal evolution of large-scale vortical structures and fuel concentration is examined with the aid of PIV and PLIF in order to elucidate the control mechanisms. It is found that, depending on the driving signal of the flaps, the near-field vortical structures are significantly modified and two types of lifted flames having different stabilization mechanisms are realized.