Analysis of Carbon Dioxide Concentration in the Shuttle Orbiter Middeck for the Launch on Need (LON) Mission

This paper presents results of the CFD study aimed at evaluation of the CO₂ concentration within the Shuttle Orbiter Middeck during the Launch on Need (LON) Crew Rescue flight. An assessment of the Middeck ventilation characteristics has been performed for two possible ventilation arrangements. A recommendation to use the ventilation system configuration with the open aft floor diffuser has been made on the basis of a three-dimensional airflow and CO₂ gradient analysis.