UC知道各位达人,帮忙翻译下,急,不要软件翻的~谢谢
来源：百度知道 编辑：UC知道 时间：2024/06/25 03:17:04
3.2. Choice of model
In fire hazard assessments, it is common to use the solid flame
model. This consists of assimilate the flame to a simple surface,
usually a cone or a cylinder, and determining the radiation that
hits targets, using Eq. (2):
This means that the heat flux on a target ˙q is calculated as
product of the atmospheric transmissivity, τ, the average emissive
power of the flame, E, and the view factor between flame
and target, F.
Atmospheric transmissivity represents the capacity of air to
absorb radiation and essentially depends on relative humidity,
ambient temperature and the distance between the flame surface
and target. Of the various equations proposed for the estimation
of this parameter, the suggestions made by Bagster and Pitblado
[16] and Wayne [17] were used. Note that, for the definition
of transmissivity, these correlations are applicable in both the
stationary and
In fire hazard assessments, it is common to use the solid flame
model. This consists of assimilate the flame to a simple surface,
usually a cone or a cylinder, and determining the radiation that
hits targets, using Eq. (2):
This means that the heat flux on a target ˙q is calculated as
product of the atmospheric transmissivity, τ, the average emissive
power of the flame, E, and the view factor between flame
and target, F.
Atmospheric transmissivity represents the capacity of air to
absorb radiation and essentially depends on relative humidity,
ambient temperature and the distance between the flame surface
and target. Of the various equations proposed for the estimation
of this parameter, the suggestions made by Bagster and Pitblado
[16] and Wayne [17] were used. Note that, for the definition
of transmissivity, these correlations are applicable in both the
stationary and
3.2. 模型的选择
在火危险评估中, 使用固体火焰是通常的模型。 这所组成使对一个简单的表面火焰同化,通常一个圆锥体或一个圆筒, 而且决定放射线点击数目标,使用情绪商数。 (2):
大气的透射率表现空气的能力到吸收放射线和本质上仰赖比较的湿气,在火焰表面之间的周围温度和距离而且目标。 为判断各种不同的相等计画这一个叁数, 被 Bagster 和 Pitblado 做的提议[16] 和韦恩 [17] 被用。 注意那, 为定义透射率，这些相互关系是可适用在两者里面那火的固定之物体和 boilover 时期
当热的放射线发出的时候 , 发射的力量被定义藉着时间和表面的对于每单位一个目标的一个身体。 火焰一群点组成吗, 每一个由于一不同的发射被被 Stefan – Boltzmann 法律决定使那一个罐子有力量:
在大的碳化氢火灾中,的有助于的火焰部份到放射线发射本质上是连续的火焰地域和间歇的火焰地域, 自火的发射以后羽毛通常由于低的温度是可以忽略的。 平均焚烧发射的力量将会因此仰赖尺寸这二个地域。 较低的部份 (连续的火焰) 有非常高的发射力量 (120 –左右 140个千瓦/m2), 当的时候较高的部份 (间歇的火焰) 被时常部份地阴暗藉着烟而且被分配 20 – 40个千瓦/m2 的发射力量。
表 2 给摘要被选择的相互关系的描述在我们的分析估计平均的发射力量大的碳化氢在静止的时期期间点火。 因为, 当做它是在所有的柴油火灾中实验式地观察, 数量烟在 boilover 期间被减少, 承担是合理的平均的发射力量将会增加。 目标这工作要定量一个如此次序的增加获得可靠的价值在该哪一以安全距离的需求作基础之上在那包括的意外事件的情形变薄-层 boilover。