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多喷嘴对置式气化炉内撞击火焰高度研究

DOI: 10.13334/j.0258-8013.pcsee.2014.17.003, PP. 2761-2768

Keywords: 多喷嘴对置,撞击火焰高度,火焰脉动频率,伪彩色增强,图像分割

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Abstract:

基于多喷嘴对置式气流床气化热模实验平台,利用侧面高温内窥镜配合工业高速相机,对不同工况下的柴油撞击火焰高度及脉动频率进行了研究。提出了一种基于伪彩色增强的撞击火焰高度图像分割方法。利用工业高分辨率相机和顶部高温内窥镜的组合对结果进行了验证。结果表明,在实验工况下,撞击火焰高度随氧碳比([O]/[C])的升高逐渐上升,但在氧碳比为1.8附近出现转折;提高柴油流量,火焰高度上升明显。氧碳比的升高和柴油流量的增加均使得火焰高度的脉动范围减小,撞击火焰稳定性增强。撞击火焰高度的脉动频率集中在低频区,其主要频率的特征峰保持在10Hz以内,另外,在3Hz附近存在一明显的特征峰。氧碳比的升高和柴油流量的增加均使得特征峰的幅值逐渐降低。

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