This paper presents a brief overview of recent research conducted by our group to advance current understanding of primary and secondary atomization as well as the turbulent combustion of sprays. The focus is on air-blast atomization. The burner employed exploits the benefit of recessing a liquid-injecting needle into the primary air-blast annulus to transition the spray exiting the burner from dilute to dense. A pilot is used to stabilize the flame to the burner which is sitting in a co-flowing stream of secondary air. Direct links are found between the wave instabilities and the size of the fragments shed from the liquid core. In the secondary atomization zone, the statistics of three types of fragments, namely droplets, ligaments and irregular fluid shapes are provided. This approach may provide a platform for the modelling of denser spray flames without the need to account for primary atomization. For reacting cases, mean temperature measurements are presented. This burner (referred to as the needle spray burner) is employed to stabilize dilute and dense spray flames.

中文翻译：

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专注于雾化和湍流燃烧的密集喷雾

本文简要概述了我们小组最近进行的研究，以促进当前对初级和次级雾化以及喷雾湍流燃烧的理解。重点是鼓风雾化。所使用的燃烧器利用了将液体喷射针嵌入主鼓风环中的优点，以将离开燃烧器的喷雾从稀变浓。引燃器用于稳定燃烧器的火焰，该燃烧器位于共同流动的二次空气流中。在波浪不稳定性和从液体核心脱落的碎片大小之间发现了直接联系。在二级雾化区，提供了三种类型的碎片的统计数据，即液滴、韧带和不规则流体形状。这种方法可以为更密集的喷雾火焰建模提供一个平台，而无需考虑初级雾化。对于反应情况，提供了平均温度测量值。该燃烧器（称为针状喷雾燃烧器）用于稳定稀而浓的喷雾火焰。