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根据国际空间站实际舱体结构建立相似试验模型,进行舱室微重力环境有强迫通风情况火灾烟雾分布规律数值模拟研究。气流组织形式采用顶部45°斜向进风和底板出风口自然通风,利用FLUENT软件进行舱室内气流组织数值模拟,考察强迫通风能否满足航天员热舒适性要求在保证舱室内热舒适性的同时加入火源,考察微重力环境强迫通风舱室内火灾烟雾浓度分布情况。火源位置分别设置在底面中心和侧壁中心,采用LES(Large Eddy Simulation)方法求解Navier-Stokes方程。模拟研究结果可为航天器舱内光电感烟型早期火灾探测器的合理安装提供理论指导。
According to the actual space structure of the International Space Station, a similar experimental model was established to study the numerical simulation of fire smoke distribution in the micro-gravity environment of cabin with forced ventilation. Airflow organization adopted 45 ° diagonal air inlet at top and natural ventilation at floor outlet. The numerical simulation of airflow in cabin with FLUENT software was conducted to investigate whether forced ventilation could meet the requirements of astronaut thermal comfort while ensuring the thermal comfort in the cabin Add fire source to investigate the indoor fire smoke concentration distribution in the micro-gravity environment forcing ventilation cabin. The locations of fire sources were set at the center of the bottom surface and the center of the sidewall respectively. The Navier-Stokes equations were solved by the LES (Large Eddy Simulation) method. The simulation results can provide theoretical guidance for the reasonable installation of Photoelectric Smoke-based early fire detectors in spacecraft.