论文标题
三重闪烁的浮力扩散火焰中的涡流相互作用
Vortex Interaction in Triple Flickering Buoyant Diffusion Flames
论文作者
论文摘要
计算研究了三重闪烁的浮力扩散火焰作为耦合振荡器的非线性动力学系统。在先前的烛光实验中观察到的四种不同的动力学模式（同相，死亡，旋转和部分同相）是针对甲烷的射流扩散火焰的计算复制的。从涡流相互作用的角度，尤其是涡度重新连接和涡流诱导的流程的角度来解释这四个模式。具体而言，同期模式是由三个环形涡流的重新连接形成的Trefoil涡流的周期性脱落引起的。死亡模式是由于抑制了较小的雷诺数字的涡旋脱落。旋转模式出现为三个环形涡流，或者以恒定的相位差出来。部分同相模型是由两个环形涡流的涡度重新连接引起的，而另一个旋转涡流使另一个在反相中脱落。
Triple flickering buoyant diffusion flames as a nonlinear dynamical system of coupled oscillators were computationally investigated. The four distinct dynamical modes (in-phase, death, rotation, and partial in-phase) observed in the previous candle-flame experiments were computationally reproduced for jet diffusion flames of methane. The four modes were interpreted from the perspective of vortex interaction and particularly of vorticity reconnection and vortex-induced flow. Specifically, the in-phase mode is caused by the periodic shedding of the trefoil vortex formed by the reconnection of three toroidal vortices; the death mode is due to the suppression of vortex shedding at small Reynolds numbers; the rotation mode appears as three toroidal vortices alternatively shed off with a constant phase difference; the partial in-phase model is caused by the vorticity reconnection of two toroidal vortices leaving another one shedding off in anti-phase.
