Local quenching phenomena of a lean premixed flat flame impinging with a pulsating air jet
Local quenching phenomena of a lean premixed flat flame impinging with a pulsating air jet
复制标题
脉动空气射流冲击稀薄预混平焰的局部淬火现象
DOI：
10.1088/1742-6596/530/1/012013
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Ikuyo Makino
中科院分区：
文献类型：
--
作者：
Yuji Yahagi;Ikuyo Makino
实验研究了在壁面滞流中水平形成的贫甲烷空气预混平焰在脉动空气射流冲击下的局部淬火现象。燃烧器系统由 40mm 倒置喷嘴燃烧器和垂直排列的带有 8mm 直径空气喷嘴的实心壁组成。脉动频率设置为 100Hz，而扬声器产生的射流强度高达 6 m/s。脉动空气射流使大约'00mm的盘形火焰锋弯曲，并且空气射流冲击点被局部淬火。淬火开始工况的燃料浓度随着空气射流强度的增加而增加，因为射流强度的增加与火焰应变率增益相关。对于弱射流强度范围，淬火孔直接发展为整体火焰熄灭。另一方面，对于中度或强射流条件，火焰可以从局部淬火现象中恢复。在这种情况下，一旦产生淬火孔，但该孔可能会因火焰传播或重燃过程而闭合。然后，根据具体情况，整个火焰熄灭极限低于无射流冲击条件。
Local quenching phenomena of a lean methane air premixed flat flame formed horizontally in a wall stagnating flow impinging with a pulsating air jet has been investigated experimentally. The burner system consists of 40mm inverted nozzle burner and a solid wall with 8mm diameter air jet placed in line vertically. The pulsating frequencies set up to 100Hz while the jet intensities generate up to 6 m/s by a loud speaker. Approximately'00mm disk shape flame front is curved by the pulsating air jet and the air jet impacting point is locally quenched. The fuel concentration of quenching start condition increases with increasing the intensity of air jet, because the increased jet intensity linked with the flame strain rate gain. For weak jet intensity range, the quenching hole becomes directly to develop the whole flame extinction. On the other hand, for moderate or strong jet condition, the flame can recover from the local quenching phenomena. In this condition, once the quenching hole creates, but the hole may close by the flame propagation or reigniting process. Then, the whole flame extinction limits are lower than no jet impacting condition depending on the circumstances.
登录
查看更多内容
影响因子：
4.4
作者：
J. Kerl;C. Lawn;F. Beyrau
通讯作者：
J. Kerl;C. Lawn;F. Beyrau
周期性紧张、稀薄逆流火焰的熄灭时间尺度
影响因子：
2.4
作者：
K. Sardi;J. Whitelaw
通讯作者：
J. Whitelaw
对向湍流中预混和非预混组合火焰的熄灭现象
DOI：
--
发表时间：
2007
期刊：
--
影响因子：
--
作者：
Y. Yahagi;Yokoyama Yokoyama;Nakaza Nakaza;T. Tsunekawa
通讯作者：
T. Tsunekawa
滞点流中贫甲烷/空气湍流预混火焰的熄灭机制
DOI：
10.1016/s0082-0784(06)80068-8
发表时间：
1992
期刊：
--
影响因子：
--
作者：
Y. Yahagi;T. Ueda;M. Mizomoto
通讯作者：
M. Mizomoto