Understanding the parameters that affect firebrand burning conditions is needed to quantify and model heat transfer from firebrands to combustible surfaces. In this research, an experimental and analytical effort was conducted to determine the variable relationships that control firebrand burning. A series of experiments were performed to quantify the mass loss rate, temperature, and char diameter change with time for single and arrays of cylindrical firebrands. An analytical model was developed to predict the time dependent burning of firebrands including ash accumulation in forced flow conditions. Six different methods for predicting char oxidation were included in the model to identify the best approach for predicting firebrand burning. Based on the simulation results, the model with char oxidation determined using the heat and mass transfer Reynolds analogy provided the best results with predicted temperatures, char diameter, and mass loss rates within 5%, 4%, and 29% of the single firebrand test data, respectively. Higher differences were predicted with arrays of firebrands, which was attributed to the complex flow field that develops around the firebrands. Analysis of the analytical equations was used to identify the variable relationships affecting firebrand temperature, mass loss rate, char diameter, and burning duration.

需要了解影响引火物燃烧条件的参数，以量化和模拟从引火物到可燃表面的热传递。在这项研究中，进行了实验和分析工作以确定控制火炬燃烧的变量关系。进行了一系列实验以量化单个和阵列圆柱形火柴的质量损失率、温度和炭直径随时间的变化。开发了一种分析模型来预测火种的时间相关燃烧，包括强制流动条件下的灰分积累。模型中包含了六种不同的炭氧化预测方法，以确定预测火种燃烧的最佳方法。根据仿真结果，使用传热和传质雷诺类比确定的炭氧化模型提供了最佳结果，预测温度、炭直径和质量损失率分别在单一火斑测试数据的 5%、4% 和 29% 以内。使用火点阵列预测了更高的差异，这归因于在火点周围形成的复杂流场。分析方程的分析用于确定影响火斑温度、质量损失率、炭直径和燃烧持续时间的变量关系。这归因于围绕火种发展的复杂流场。分析方程的分析用于确定影响火斑温度、质量损失率、炭直径和燃烧持续时间的变量关系。这归因于围绕火种发展的复杂流场。分析方程的分析用于确定影响火斑温度、质量损失率、炭直径和燃烧持续时间的变量关系。