使用先进的3D成像技术来描述火焰淋浴的新方法
Nicolas Bouvet1, Eric D Link1, Stephen A Fink1
1National Institute of Standards and Technology (NIST), 100 Bureau Drive, Gaithersburg, MD 20899.
Experiments in fluids
|February 5, 2024
概括
一个新的诊断工具同时测量空气中的火焰 (燃烧的火) 轨迹和尺寸分布在3D. 这一创新增强了对野地 - 城市界面火灾传播和暴露风险的理解.
科学领域:
- 消防科学 消防科学 消防科学
- 流体动力学 流体动力学
- 图像技术技术的成像技术
背景情况:
- 野地 - 城市界面 (WUI) 的火灾由于空中的火焰带来了重大风险.
- 准确地描述燃烧行为对于预测火灾蔓延和减轻损害至关重要.
- 现有的火焰分析方法在捕捉它们的全部3D性质和动态方面存在局限性.
研究的目的:
- 引入一种新的,可在现场部署的诊断工具,用于描述空中的火焰.
- 为了能够同时测量时间分辨率的火焰流和3D尺寸分布.
- 在WUI火灾场景中全面了解火焰传输和暴露.
主要方法:
- 整合3D粒子跟踪速度测量 (3D-PTV) 用于轨迹映射.
- 使用视觉船体原理进行3D粒子形状重建 (3D-PSR) 的整合.
- 开发一种新的累积粒子计数 (CPC) 和粒子数流 (PNF) 的图形表示.
主要成果:
- 成功地将诊断工具应用于人工生成的火焰淋浴.
- 展示3D火焰轨迹,流量和尺寸分布的同时测量.
- 航空火焰大小分布与地面收集数据的比较,突出了该工具的功能.
结论:
- 开发的诊断工具提供了前所未有的功能,用于在3D中研究空中的火焰.
- 这项技术促进了与WUI消防安全相关的火焰暴露指标 (CPC,PNF) 的评估.
- 为了提高准确性,建议对粒子形状重建方法进行进一步的改进.
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