中文摘要：

利用电加热板模拟外界热辐射，研究了不同火灾规模情况下高温热辐射对同体表面火蔓延特性的影响规律．实验中，通过网像技术和热电偶测温技术相结合，测量了火灾蔓延过程中火焰形态、温度场分布以及火蔓延速度等特性参数的变化规律．结果表明，随着高温热辐射强度的增加，同体可燃物内部温升速率显著提高，相应的火蔓延速率和火焰面积（对应热释放速率和火灾规模）也明显增加．通过对实验结果进行分析，得到了火蔓延速率与热辐射强度之间的函数关系式，并基于此建立了受限空间火灾规模增长特性的理论预测模型．

英文摘要：

The influence of thermal radiation on the flame spread over the solid surface in limited space was investigated using the electrical heating panel. Flame shapes, temperature distribution, and flame spread rate are measured by the technologies of image and thermocouples. The increase of thermal radiative intensity obviously increases the temperature rise rate in solid phase, and thus increases the flame spread rate and the flame areas （the symbol of heat release rate and fire scale）. The relationship function between flame spread rate and thermal radiation was obtained by the analysis of experimental results, and a theoretical model of fire growth was built for predicting the change of fire scale in constrained fires.