Computational Modeling of Air Distribution Characteristics for the Crew Sleeping Quarter Comfort for Spacecraft

The objective of the Computational Fluid Dynamics (CFD) study is to analyze the airflow, heat transfer and carbon dioxide transport in a crew sleeping quarter. The discussion is based on the results of detailed analysis of air distribution in the United States Orbital Segment Node 2 module living crew quarters (CQs). The paper presents examination of the CQ ventilation scenario for the revised supply duct configuration. The focus of the discussion is on the velocity magnitude, temperature and carbon dioxide spatial/temporal variations with respect to sleeping crewmember safety and comfort. The computational data obtained allowed concluding that there is no considerable risk of stagnant zones formation within the CQ cabin with the improved configuration. The minimum flow rate for crewed space comfort is suggested. The CFD model developed in the paper will provide insights into requirements contributing to a more sustainable crewed space for future space exploration.