The flame pocket formation, including reactant pocket, product pocket, soot pocket, and fluid parcel, is a common phenomenon in turbulent combustion occurred as a response of the flame to flow straining and shearing. Understanding pocket behavior is vital to study the flames in such a regime. This work addresses the research need to experimentally measure and track multiple flame pockets in 3D. For this purpose, volumetric measurements were performed to measure the high-speed turbulent flame structure at 15 kHz based on emission tomography. With the 3D flame structures, a new tracking algorithm was developed to identify and track the multiple flame pockets simultaneously in 3D. The instantaneously tracked 3D flame pockets enabled the extraction of key properties of pocket dynamics, including the favorable formation location, 3D3C movement speed, and pocket expanding/shrinking speed. The developed methods were evidently able to resolve the detailed behavior of flame pockets in highly turbulent flames.

火焰袋的形成，包括反应物袋、产品袋、烟灰袋和流体包裹，是湍流燃烧中的常见现象，是火焰对流动应变和剪切的响应。了解口袋行为对于研究这种制度下的火焰至关重要。这项工作解决了在 3D 中通过实验测量和跟踪多个火焰袋的研究需求。为此，进行体积测量以基于发射断层扫描测量 15 kHz 的高速湍流火焰结构。使用 3D 火焰结构，开发了一种新的跟踪算法，以在 3D 中同时识别和跟踪多个火焰袋。即时跟踪的 3D 火焰口袋能够提取口袋动力学的关键属性，包括有利的形成位置、3D3C 运动速度、和口袋扩展/收缩速度。所开发的方法显然能够解决高度湍流火焰中火焰袋的详细行为。