Relationship Between Blow-Off Behavior and Limiting Oxygen Concentration in Microgravity Environments of Flame Retardant Materials
Relationship Between Blow-Off Behavior and Limiting Oxygen Concentration in Microgravity Environments of Flame Retardant Materials
复制标题
阻燃材料微重力环境下吹气行为与极限氧浓度的关系
DOI：
10.1007/s10694-019-00880-2
复制
发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
Yoshinari Kobayashi
中科院分区：
文献类型：
--
作者：
Shuhei Takahashi;Kaoru Terashima;Muhammad Arif Fahmi bin Borhan;Yoshinari Kobayashi
微重力条件下材料的可燃性是影响空间火灾安全的重要因素之一。据报告，微重力条件下的极限氧浓度（LOC）不同于正常重力条件下的极限氧浓度（LOC 1g），后者是通过向下扩散试验测得的，通常用作易燃性指标。然而，在微重力环境下进行筛选可燃性试验既昂贵又耗时。因此，有必要开发一种新的方法来预测在正常重力下测量的数据的材料的可燃性。在我们先前的研究中，我们开发了一个简化的模型，火焰蔓延试验在反向流动的尺度分析。在这里，我们提出了几种阻燃材料在反向流的可燃性地图获得的地面吹离试验和抛物线飞行实验，和发展的模型的可燃性地图的趋势进行了讨论。材料的热分解温度与相反的流速单调增加，其热解温度低于823 K，在微重力环境中的热分解温度低于正常重力环境;其他研究材料在微重力环境中的热分解温度高于正常重力环境。简化模型很好地解释了这些趋势，预测的极限曲线与热薄材料的实验结果定量一致，这表明所开发的模型的实用性。
The flammability characteristics of materials in microgravity are some of the most important factors for fire safety in space. It has been reported that the limiting oxygen concentration (LOC) in microgravity is different from that in normal gravity (LOC1g), which is measured by downward spread tests and is often used as an index of flammability. However, it is expensive and time consuming to conduct screening flammability tests in microgravity environments. Hence, it is necessary to develop a novel procedure for predicting the flammability of a material with data measured in normal gravity. In our previous study, we developed a simplified model for flame spread tests in opposed flow by scale analysis. Here, we present the flammability maps of several flame retardant materials in opposed flow obtained by ground-based blow-off tests and parabolic flight experiments, and the trends of the flammability maps are discussed with the developed model. Materials whose LOC increased monotonically with the opposed flow velocity and whose pyrolysis temperature was less than 823 K had a lower LOC in microgravity environments than in normal gravity; the other investigated materials showed larger LOC in microgravity than that in normal gravity. These trends were well explained by the simplified model, and the predicted limiting curve agreed quantitatively with the experimental result for thermally thin materials, which indicates the usefulness of the developed model.
微重力环境下阻燃材料的极限氧浓度
DOI：
10.15011/jasma.34.3.340304
发表时间：
2017
期刊：
影响因子：
--
作者：
K. Maruta;K. Tsuboi;Shuhei Takahashi
通讯作者：
Shuhei Takahashi
影响因子：
3.4
作者：
Bhattacharjee, Subrata;Simsek, Aslihan;Ferkul, Paul
通讯作者：
Ferkul, Paul
部分重力加速下的浮力向下扩散火焰传播和熄灭
影响因子：
1.9
作者：
K. Sacksteder;J. T’ien
通讯作者：
J. T’ien