The experimental investigations are designed to study ignition behaviors of ethanol and heptane pool by adjacent fires. Four quartz glass pools with diameters of 74, 114, 150 and 200 mm are used. The multiple of pool diameter is selected as a criterion to characterize critical ignition distance with different pool diameters. The influences of pool diameter and interval distance on critical ignition time and ignition distance are explored. Results show that the critical ignition time depends slightly on pool diameter, but significantly on interval distance. The critical ignition distance falls into the range of 0.20 D - 0.47 D for ethanol, while it is 0.95 D - 1.40 D for heptane. Based on cylindrical model, an integration method is proposed to calculate the flame radiation imposed to adjacent pool. The calculated radiant heat flux is basically consistent with measurement for heptane, but it deviates for ethanol. The cylinder model is not suitable for predicting radiant heat flux near the fire contour. The average radiant heat flux received by neighbouring pool is obtained by the method of doubly integrating configuration factor. Then, the equivalent radiation distance and equivalent radiation area are calculated under various pool diameters and non-dimensional interval distances.

实验研究旨在研究相邻火势对乙醇和庚烷池的着火行为。使用了四个直径分别为74、114、150和200 mm的石英玻璃池。选择池直径的倍数作为标准来表征具有不同池直径的临界点火距离。探讨了熔池直径和间隔距离对临界点火时间和点火距离的影响。结果表明，临界点火时间在一定程度上取决于池直径，但在很大程度上取决于间隔距离。乙醇的临界点火距离在0.20 D -0.47 D的范围内，而在0.95 D -1.40 D的范围内庚烷。在圆柱模型的基础上，提出了一种积分法来计算火焰对邻近水池的辐射。计算出的辐射热通量与庚烷的测量值基本一致，但对乙醇却有所不同。圆柱模型不适合预测火轮廓附近的辐射热通量。相邻池接收的平均辐射热通量是通过对配置因子进行二次积分的方法获得的。然后，在各种池径和无量纲间隔距离下计算等效辐射距离和等效辐射面积。