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首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >PIV/PLIF investigation of two-phase vortex-flame interactions: effects of vortex size and strength
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PIV/PLIF investigation of two-phase vortex-flame interactions: effects of vortex size and strength

机译：PIV / PLIF研究涡流-火焰两相相互作用：涡流大小和强度的影响

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The evolution of flame surface area and rate of CH layer extinction are measured during the interaction of a two-phase counterflow diffusion flame with fuel-side vortices of varying size and strength. Planar laser-induced fluorescence (PLIF) of CH is used to mark the flame front and particle-image velocimetry (PIV) is used to measure the strain rate field at various phases of the interaction process. Vortices of similar initial circulation but differing in size showed widely disparate peak strain rates and CH decay rates because of varying levels of flame-induced vortex dissipation. Vortex size is also found to have a significant effect on flame surface area evolution during and after extinction, with the presence of droplets playing a significant role in the latter. Implications of these results for the fundamental understanding of vortex-flame interactions are discussed. [References: 23]
机译：在两相逆流扩散火焰与尺寸和强度不同的燃料侧涡旋相互作用期间，测量了火焰表面积的演变和CH层的消光速率。 CH的平面激光诱导荧光（PLIF）用于标记火焰前沿，而粒子图像测速仪（PIV）用于测量相互作用过程各个阶段的应变率场。初始循环相似但大小不同的涡流由于火焰诱发的涡流消散程度不同而显示出截然不同的峰值应变率和CH衰减率。还发现涡旋尺寸对熄灭过程中和熄灭后的火焰表面积产生了重大影响，液滴的存在在后者中起着重要作用。讨论了这些结果对旋涡-火焰相互作用的基本理解的含义。 [参考：23]

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