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应用PIV(粒子成像测速技术)针对工业燃烧设备中以平焰燃烧为代表的高温预混燃烧过程,开展燃烧与非燃烧的冷、热态两种工况湍流流场的对比研究,揭示了高温预混燃烧对湍流涡旋积分尺度分布特性的影响。研究发现:伴随着动量和能量传输的燃烧过程,高温预混燃烧直接影响湍流涡旋结构的大小及分布。热态燃烧工况存在的最小积分尺度(12 mm)恰好是位于动量、能量强烈交换的火焰区,而速度和速度梯度很小的低速流动区存在较大积分尺度(23mm)。本研究为深入分析预混火焰传输机理打下基础。
Application of PIV (Particle Imaging Velocimetry) Aiming at the high-temperature premixed combustion process represented by flat-flame combustion in industrial combustion equipment, the contrastive study of turbulent flow field in both combustion and non-combustion cold and hot conditions was carried out. The Influence of Premixed Combustion on the Scatter Scatter Distribution of Turbulence. It is found that the combustion process with momentum and energy transfer directly affects the size and distribution of turbulent eddy structures. The smallest integral scale (12 mm) existed in the hot combustion condition happens to be in the flame zone where the momentum and energy are strongly exchanged. However, there is a large integral scale (23 mm) in the low-velocity flow zone where the velocity and velocity gradients are very small. This study lays the foundation for further analysis of premixed flame transport mechanism.