Combined two-photon optical connectivity and planar laser induced fluorescence for instantaneous characterisation of liquid interface during primary atomisation
Combined two-photon optical connectivity and planar laser induced fluorescence for instantaneous characterisation of liquid interface during primary atomisation
复制标题
结合双光子光学连接和平面激光诱导荧光，用于初级雾化期间液体界面的瞬时表征
DOI：
10.1016/j.expthermflusci.2023.110935
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发表时间：
2023
影响因子：
3.2
通讯作者：
Wang T
中科院分区：
文献类型：
--
作者：
Wang T
一种结合了双光子激发（TPE）、平面激光诱导荧光（PLIF）和光学连接（OC）的技术已被应用于捕获垂直于雾化过程中暴露于空气横流的液体射流核心主方向的横截面的瞬时几何形状。本文证明纳秒脉冲激光可以在雾化罗丹明 B 染色水射流中激发双光子荧光。它表明 TPE-PLIF 本身在空气横流雾化过程中捕获液体界面方面存在局限性。 TPE-PLIF 和 TPE-OC 的组合在距液体射流出口固定距离处垂直于液体射流轴的目标横截面激发 TPE 荧光，并消除了各个技术的限制。描述了组合技术和相关图像处理的仪器的优化，并演示了液体射流表面上雾化过程中形成的瞬时横截面结构的量化。
A technique that combines two-photon excitation (TPE), planar laser induced fluorescence (PLIF) and optical connectivity (OC) has been applied to capture the instantaneous geometry of a cross-section normal to the main direction of the core of a liquid jet exposed to a crossflow of air during atomisation. This paper demonstrates that a nanosecond pulse laser can excite two-photon fluorescence in an atomising Rhodamine B-dyed water jet. It shows that TPE-PLIF on its own has limitations to capture the liquid interface during air-crossflow atomisation. The combination of TPE-PLIF and TPE-OC excites TPE-fluorescence at a targeted cross-section normal to the liquid jet axis at a fixed distance from the liquid jet exit and eliminates the limitations of the individual techniques. The optimisation of the instrumentation of the combined techniques and the associated image processing are described and the quantification of the instantaneous cross-section structures, developing during atomisation, on the surface of the liquid jet is demonstrated.