載人航天器密封艙CO<sub>2</sub>擴(kuò)散規(guī)律仿真研究

載人航天器密封艙CO₂擴(kuò)散規(guī)律仿真研究

摘要: 文章以載人航天器密封艙為研究對(duì)象，采用k-ε湍流模型,、組分輸運(yùn)模型及自定義函數(shù)邊界對(duì)空間站密封艙內(nèi)航天員代謝產(chǎn)物CO₂的分布規(guī)律進(jìn)行了數(shù)值仿真,，結(jié)果表明：45°角送風(fēng)及艙間通風(fēng)交換方案形成的流場(chǎng)可以保證艙內(nèi)CO₂成分的有效傳質(zhì)，航天員兩側(cè)艙壁附近的CO₂濃度相對(duì)較高,，異艙放置CO₂凈化設(shè)備的方法可以滿足CO₂控制需求,。研究結(jié)果可以為載人航天器CO₂傳感器以及凈化裝置的布置以及通風(fēng)形式的優(yōu)化提供參考。

Abstract: The k-ε turbulence model, the species transport model and a user-defmed function are employed to simulate the dispersion of CO₂ contaminant in a manned spacecraft. The results are as follows. The 45° eject flow in the single cabin and the airflow exchange between adjacent cabins can have a highly effective transfer of species; the concentration of CO₂ near the cabin wall on the right or left side ofthe astronauts is a little higher than that in the other regions; the CO₂-purilying device Can satisfy the requirements of the CO₂ control when it is installed in another unmanned cabin. The study may provide some guidelines for organizing the CO₂ purifying devices and CO₂ sensors in manned space station cabins and for improving the airflow scheme.