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 热辐射通量
 Practical method of calculating the distribution of the planar radiation heat flux in the fire space 着火空间二维平面热辐射通量分布工程计算方法 短句来源 The solid flame radiation model given by the U.S.Nuclear Regulatory Commission is applied in the calculation. A calculation example is presented and the planar distribution of the radiation heat flux is obtained. This study provides an idea for the engineering calculation of the radiation heat flux in the fire space. 文章利用固体火焰辐射模型,以网格划分的方法发展了一种空间二维平面热辐射通量的工程计算方法,利用C语言编制简单的计算程序,计算出着火空间二维平面热辐射通量的分布,在计算过程中应用了美国Nuclear Regulatory Commission(NRC)发布的计算公式,保证了计算结果的准确性,为火灾中热辐射通量的工程计算提供了一定的思路和方法。 短句来源
 辐射热流
 With 40kW/m~2 externally applied radiation heat flux, under 5%, 15%, 18% oxygen concentration and common atmospheric conditions, surface temperature variation and mass loss rate of the three kinds of materials were measured. 在40kW/m2外加辐射热流、5%、15%和18%氧浓度及空气气氛条件下,得到了三种材料的表面温度随时间变化的规律,同时测量了三种材料在缺氧环境下的质量损失速率随时间的变化,给出了气氛对材料热解与着火的影响。 短句来源 The effect of the particle scattering and different boundary conditions on the directional radiation heat flux was examined. The calculation results were compared with forward Monte-Carlo method. The result shows the superiority in computational efficiency of backward Monte-Carlo method. 利用反向蒙特卡罗法模拟计算高温含粒子自由流的红外辐射特性,考察了自由流中粒子散射和边界条件对定向辐射热流的影响,并与正向蒙特卡罗法进行比较,比较结果表明反向蒙特卡罗法在计算效率上明显优越. 短句来源 Analyses show the reason that the temperature and material can't be preserved simultaneously for the model lies in that the radiation heat flux doesn't change with the scale ratio. 而本文在理论分析与数值研究的基础上,根据辐射热流密度在模型舱中不随比例变化的特性,提出了修改热流的温度-湿度-材料综合保持技术,并用数值方法得到了模型壁面的热流分布。 短句来源 INVERSE PROBLEM OF BOUNDARY INCIDENT RADIATION HEAT FLUX IN SEMITRANSPARENT PLANAR SLAB 半透明平板边界入射辐射热流密度的反问题 短句来源 (2) The results demonstrate that heat release rate will vary linearly with the change of the radiate heat flux, this relation is tenable approximately under the condition that the radiation heat flux is higher and doesn't be lower than this low bound of 30kW/m2. According to the linear relations, I have put forward this concept of heat release coefficient, and can judge the complexity that the material burns according to this parameter. (2) 在辐射热流较高的情况下(不低于30kW/m2),材料的热释放速率会随着辐射热流的改变呈现出线性的变化规律。 根据这个线性关系,笔者提出了热释放系数这个概念,并依据这个参数可判断材料燃烧的难易程度。 短句来源 更多
 辐射热流密度
 INVERSE PROBLEM OF BOUNDARY INCIDENT RADIATION HEAT FLUX IN SEMITRANSPARENT PLANAR SLAB 半透明平板边界入射辐射热流密度的反问题 短句来源 Analyses show the reason that the temperature and material can't be preserved simultaneously for the model lies in that the radiation heat flux doesn't change with the scale ratio. 而本文在理论分析与数值研究的基础上,根据辐射热流密度在模型舱中不随比例变化的特性,提出了修改热流的温度-湿度-材料综合保持技术,并用数值方法得到了模型壁面的热流分布。 短句来源 An inverse method is presented for estimating the unknown boundary incident radiation heat flux in semitransparent planar slab with transparent boundaries from the knowledge of the radiation intensities exiting the boundaries. 提出了一种由一侧边界出射辐射强度反演另一侧边界入射辐射热流密度的方法。 短句来源 A physical model of the heat transfer between heat exchanger and cold box has been built based on the practical engineering project of CARR-CNS. The simulation of the heat transfer between heat exchanger and cold box is conducted by coupling the thermal radiation and conduction. The radiation heat flux is obtained by calculation and the influence of temperature distribution of exchanger is also calculated. 以中国先进研究堆(CARR)的冷中子源项目为背景,建立了低温换热器与冷箱换热的物理模型,并通过对换热器内部冷热流体之间的传热以及换热器与冷箱、管道、支架之间辐射换热的耦合计算,得出冷箱和换热器的辐射热流密度,以及辐射跑冷对冷箱内部换热器温度分布的影响。 短句来源
 辐射热流量

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