This paper experimentally investigated the flame tilt transition of the heptane pool fires inside a compartment with horizontal opening in cross wind, which has not been reported till now. A series of experiments were carried out with a 0.4 m cubic compartment with fully opening at the top. The cross wind produced by a small-scale wind tunnel ranged from 0 to 3 m/s, which was parallel to the horizontal opening. Temperature field inside the compartment was obtained by the forty-nine thermocouples. Results showed that the flame inside the compartment with horizontal opening had a tilt transition, which would tilt from the windward side towards the leeward side with the increase of cross wind velocity, and keep vertical at a certain velocity value. The critical cross wind velocity for the flame tilt transition was obtained. Temperature differences between windward and leeward side presented the decrease and then increase trend with the cross wind velocity increasing. Moreover, the critical cross wind velocity was found to be proportional to $\frac{D}{\sqrt{hl}}{\dot{Q}}^{*}$on the basis of the dimensional analysis, and the empirical correlations of flame tilt angle were proposed to predict the flame tilt transition inside the compartment with fully horizontal opening in cross wind.

本文通过实验研究了在侧风中具有水平开口的隔室中庚烷池火的火焰倾斜过渡，至今尚未报道。在0.4 m的立方隔间（顶部完全打开）下进行了一系列实验。小型风洞产生的侧风范围为0到3 m / s，与水平开口平行。舱室内的温度场是通过四十九个热电偶获得的。结果表明，水平开口的室内火焰呈倾斜过渡，随着侧风速度的增加，火焰会从上风向下风倾斜，并保持一定的风速垂直。获得了火焰倾斜过渡的临界横风速度。迎风面和背风面之间的温差随着侧风速度的增加呈现出先降低后升高的趋势。此外，发现临界横风速度与$\frac{d}{\sqrt{H升}}{\dot{问}}^{*}$在尺寸分析的基础上，提出了火焰倾角的经验相关性，以预测侧风中完全水平开口的车厢内部的火焰倾角过渡。