燃烧剂火焰三维温度场重建

Three-dimensional Temperature Field Reconstruction of Incendiary Agent Flame

火焰温度是燃烧剂的基本性能参数,也是纵火武器毁伤效能评估的重要依据。火焰辐射属于容积辐射,温度高,难以直接测试火焰温度场。该研究针对燃烧剂固体颗粒火焰,基于米氏(Mie)散射理论优化建立了开放空间火焰辐射传输模型和辐射强度成像矩阵,通过Tikhonov正则化方法进行求解,编制软件实现了三维温度场的重建计算和可视化。采用三通道火焰辐射测试方法进行了实验验证,对汽油的燃烧火焰进行了成像测试和火焰三维温度场重建。结果表明,重建的温度场网格数为20×20×100,具有0.006 m×0.006 m×0.003 m的空间分辨率,重建温度场数值略低于热电偶单点测试结果,温度差小于50℃。研究成果可为燃烧剂燃烧性能测试和燃烧装备毁伤效能评估提供技术支撑。

Flame temperature is an essential performance parameter of incendiary agent,and also an important basis for damage effectiveness evaluation of arson weapons.The flame radiation belongs to volume radiation with high temperature,thus making it difficult to measure the flame temperature field directly.With compiled software,the reconstruction and visibility of the threedimensional temperature field was realized.Three-channel flame radiation measurement method was used for experimental verification.The gasoline combustion flame was imaged and tested,and the flame three-dimensional temperature field was reconstructed.The results showed that the number of grids in the reconstructed temperature field was 20×20×100,with the spatial resolution of 0.006 m×0.006 m×0.003 m.The reconstructed temperature field value was slightly lower than the thermocouple single point test result,with the temperature difference of within 50℃.The research results can provide technical support for the combustion performance test of combustion agent and damage effectiveness evaluation of the combustion equipment.