中文摘要：

用火焰序列图像分析办法，对具有顶棚开口的受限空间内的油池火火焰振荡模式进行了实验研究．实验观察到顶棚开口受限空间内油池火的火焰具有两种可以相互转化的振荡模式．在第1种火焰振荡模式下，根部火焰周期性膨胀与收缩，产生向上传播的蘑菇状火焰和较大的火焰高度波动；第2种火焰振荡模式根部火焰平稳，上部火焰会弯曲并左右摆动．火焰图像相关系数能定量地区分这两种振荡模式．第1种火焰振荡模式下火焰振荡频率比第2种稍大．

英文摘要：

Flame pulsation modes of pool fire in the limited ventilation compartment with a single ceiling opening were experimentally investigated by analyzing flame sequence images. Two flame oscillation modes which can convert to each other were observed. In the first mode, the flame contractes and expands periodically at the bottom, resulting in upward mushroom pufftings and considerable fluctuation in flame height. In the second mode, the bottom flame surface is quite steady and smooth, while the flame surface in the upper section is distorted and swings from left to right. The two modes can be quantitively distinguished by the correlation coefficient of flame images. The flame oscillation frequency of the first mode is larger than that of the second one.