This thesis presents a comprehensive study of liquid fuel flame topologies through the development and application of novel diagnostic techniques. The complexities associated with liquid fuel combustion, particularly in the context of aviation and aerospace applications, demand a deeper understanding of flame behavior and stability. Traditional diagnostic methods often fall short due to the intricate interactions between liquid droplets, flame surfaces, and multi-component fuel mixtures.Our research focuses on addressing these challenges by introducing advanced diagnostic approaches to investigate the structure, stability, and extinction characteristics of liquid fuel flames. Key areas of exploration include the identification and analysis of reaction zones, the impact of vaporization dynamics, and the effects of turbulent flow conditions on flame stabilization. To achieve this, we employ Laser-Induced Fluorescence (LIF) and chemiluminescence imaging, alongside advanced numerical image processing algorithms to capture high-resolution data on flame behavior. These methods enable us to discern fine details about flame front interactions, droplet vaporization, and localized extinction events. By refining these diagnostic tools, we aim to provide clearer insights into the parameters influencing flame stability, such as equivalence ratio, mixing efficiency, and preheat temperature. In addition, the study integrates computational simulations using CHEMKIN to validate experimental results, allowing for a more comprehensive understanding of how liquid fuel combustion behaves under varying conditions of turbulence and strain rates. The combined experimental and computational approach ensures that the findings are both robust and applicable to real-world aerospace scenarios. The findings of this study contribute to the broader understanding of liquid fuel combustion processes and offer valuable implications for the design and optimization of more efficient and stable combustion systems in aerospace applications. This research not only enhances our theoretical knowledge but also provides practical guidelines for improving flame diagnostics and combustion performance.
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