Abstract Under certain conditions in preferred three-stream geometries, a non-Newtonian airblast atomization flowfield violently pulses (axially and radially) by self-generating and self-sustaining interfacial instability mechanisms. The pulsing is severe enough to send acoustic waves throughout feed piping networks. The most recent work on this system instructed that exothermic chemical reactions enhance this moderate Mach number atomization. Explored herein is the potential to further enhance reaction-assisted disintegration by independently superimposing both sinusoidal and randomized mass flow fluctuations of +/− 50% of the mean onto otherwise constant gas feed streams using surrogate models. Two nozzle geometries (low versus high prefilming distance) and multiple superimposed feed frequencies (ranging from below to above the naturally dominant tone) are considered for each gas stream, making twenty-one total long-running unsteady PLIC-VOF CFD models. Droplet size, plus nine other temporal measures, were considered for assessing atomizer performance in our energy production process. Results indicate that superimposed frequencies have potential to enhance chaotic atomization in a statistically significant manner. Depending on the geometry, the largest effect was about a 10% reduction in droplet size; however, some combinations experienced a droplet size increase. Only marginal differences were seen in the nine other measures, such as injector face heat exposure. In addition to the immediate industrial benefit from modulation, dramatic changes in acoustics were produced by imposed feed perturbations at frequencies lower than the natural tone. A detailed study of start-up flow reveals new mechanisms which explain performance differences.

中文翻译：

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液体战争：增强脉冲爆破的分解和反应

摘要 在优选的三流几何结构的某些条件下，非牛顿空气喷射雾化流场通过自产生和自持界面不稳定机制剧烈（轴向和径向）脉动。脉动严重到足以在整个进料管道网络中发送声波。该系统的最新研究表明，放热化学反应增强了这种适度的马赫数雾化。本文探讨了通过使用替代模型将平均值的 +/- 50% 的正弦和随机质量流量波动独立叠加到其他恒定的气体进料流上来进一步增强反应辅助分解的潜力。每种气流都考虑了两种喷嘴几何形状（低与高预成膜距离）和多个叠加进料频率（范围从自然主导音的下方到上方），从而形成总共 21 个长期运行的非稳态 PLIC-VOF CFD 模型。在我们的能源生产过程中，考虑了液滴尺寸以及其他九种时间测量来评估雾化器的性能。结果表明叠加频率有可能以统计显着的方式增强混沌雾化。根据几何形状，最大的影响是液滴尺寸减少约 10%；然而，一些组合经历了液滴尺寸增加。在其他九项措施中只看到了微小的差异，例如喷射器表面热暴露。除了调制带来的直接工业利益之外，在低于自然音调的频率下强加馈送扰动会产生声学的巨大变化。对启动流程的详细研究揭示了解释性能差异的新机制。