中文摘要：

利用自行搭建的小尺寸实验平台,开展了对不同点火位置的乳胶泡沫材料燃烧过程的对比实验,通过对火蔓延过程中的部分重要参数（如最大火焰高度、火蔓延速度和蔓延过程中样品表面温度变化等）的测定,分析了点火位置不同时,乳胶泡沫材料的火蔓延特性。结果表明：边缘点火和中间点火条件下,最大火焰高度分别为397和491 mm,火蔓延速度分别为1.8和0.97 mm·s^-1;边缘点火时的乳胶泡沫材料表面火蔓延过程中的温度低于中间点火情况下。

英文摘要：

Natural rubber（NR） latex foam is a typical cellular structure material manufactured by liquid latex compounds and has three dimension porous network structures. This kind of material has tremendous fire hazard because it is easily ignited and flame spreads extremely fast after ignited. Ignition position is one of the most important factors to determine the fire behavior of horizontal material. The aim of this study was to investigate the fire behavior of NR latex foam under center and edge ignition positions to provide the basic data for fire hazard evaluation of enclosure fire. Two types of experiments with center and edge ignition positions were carried out in a small-size flame spread experiment bench. The sample size was 25 cm×25 cm×2 cm with 6 mm diameter hole distribution in it. The temperature both on and above the sample surface and the flame front position were monitored during the experiment. The fire process was also recorded in horizontal and an angle of 45° to the horizontal direction. Then the flame height and flame spread rate were estimated. The results show that the maximum flame heights during the edge and center ignition condition test are 397 and 491 mm, respectively. The flame spread rates under the two ignition positions condition are 1.8 and 0.97 mm·s^-1, respectively. And the flame temperature under the edge ignition condition test is lower than that of the center ignition test.