Parametric Response of a Conical Flame to Acoustic Waves
Parametric Response of a Conical Flame to Acoustic Waves
复制标题
锥形火焰对声波的参数响应
DOI：
10.1080/00102209908924190
复制
发表时间：
1999
影响因子：
1.9
通讯作者：
L. Boyer
中科院分区：
文献类型：
--
作者：
F. Baillot;D. Durox;S. Ducruix;G. Searby;L. Boyer
本文报道了高振幅、高频率（1000 Hz）冷气声强迫作用下准锥形预混火焰的实验研究。由此产生的半球形火焰，由Durox等人先前描述的再稳定效应引起，当施加更强的声学作用力时（振荡加速度通常约为1000g），示出了参数不稳定性。在这种情况下，锋面表现出不稳定的尖形胞。这些图案以两倍于声学周期的周期振荡。这种状态被确定为谐振子的参数响应。
This paper reports experiments on initially quasi-conical premixed flames subjected to acoustic forcing of the cold gases with high amplitude and high frequency ( 1000 Hz). The resulting hemispherical-shaped flame, induced by a restabilization effect described previously by Durox et al., shows a parametric instability when stronger acoustic forcing is applied (the oscillating acceleration is typically about 1000g). In this case, the front exhibits unsteady cusp-shaped cells. These patterns oscillate with a period which is twice the acoustic period. This state is identified as the parametric response of a harmonic oscillator.