Flame Extinguishment Experiment

The FLEX (Flame Extinguishment Experiment) investigation aims to map the flammability limits of liquid fuels in microgravity environments, measure the effectiveness of various gaseous fire suppressants such as CO2, He, and SF6, and develop reliable predictive models for combustion limits under reduced gravity conditions. The mission seeks to validate and improve simplified models by incorporating detailed chemical reactions, heat transfer, and material movement, using both space-based data and extensive ground-based tests. Key flight experiment goals include obtaining high-resolution measurements of droplet burning rates, flame extinction behavior, heat radiation, soot levels, and temperature profiles, while systematically analyzing the effects of different ambient conditions and suppressant concentrations. These investigations are essential for advancing the fundamental understanding of combustion processes in microgravity and enhancing fire safety protocols for future space missions.FLEX（火焰熄灭实验，Flame Extinguishment Experiment）研究旨在绘制微重力环境下液态燃料的可燃极限图谱，测定二氧化碳（CO₂）、氦气（He）、六氟化硫（SF₆）等多种气态灭火剂的灭火效能，并构建适用于低重力环境下燃烧极限的可靠预测模型。本次航天任务通过结合空间实测数据与大量地面试验数据，纳入详细化学反应、热传递及物质迁移过程，对简化模型进行验证与优化。本次飞行实验的核心目标包括获取液滴燃烧速率、火焰熄灭特性、热辐射、烟尘浓度及温度分布的高分辨率测量数据，并系统分析不同环境条件与灭火剂浓度对燃烧过程的影响。此类研究对于深化对微重力环境下燃烧过程的基础认知，以及优化未来航天任务的消防安全规程至关重要。

搜集汇总

背景与挑战

背景概述

Flame Extinguishment Experiment (FLEX) 是一个由NASA主导的微重力燃烧科学数据集，旨在研究微重力环境下液体燃料的易燃性极限和气体灭火剂的有效性。该数据集基于国际空间站的实验，通过液滴燃烧测试收集了高分辨率测量数据，包括燃烧速率、火焰熄灭行为和环境参数，以支持空间任务火灾安全协议的改进和预测模型的开发。