Computational Fluid Dynamics Airflow Modelling of the CASA -- Crew Alternative Sleeping Area of the ISS

Date

7/10/2022

Journal Title

Journal ISSN

Volume Title

Publisher

51st International Conference on Environmental Systems

Abstract

Computational Fluid Dynamics (CFD) modeling was used to analyze the airflow and carbon dioxide distribution in the International Space Station (ISS) Columbus cabin, and the Crew Alternative Sleeping Area (CASA). The study was focused on the various CASA ventilation scenarios with respect to the crewmember safety and comfort. The focus of the discussion is; first, on the ventilation performance of the Columbus cabin aisle way with respect to the ISS cabin air velocity requirements and, second, on velocity magnitude and carbon dioxide spatial/temporal variations in the CASA volume. The computational data obtained was able to verify that there should be no considerable risk of stagnant zones formation within the CASA volume at the given flow rates analyzed. The velocity distribution in Columbus satisfied the ISS velocity requirements. It was verified that the CASA's intake and exhaust design and the direction of the airflow angles selected were able to minimize the re-introduction of CO2 rich air within the CASA. These aspects were important with respect to temperature and carbon dioxide control. The paper illustrates various points of the modeling and the results for the ventilation safety, according to the requirements and operations.

Description

Chang Son, The Boeing Company, US
Nikolay Ivanov, Peter the Great St. Petersburg Polytechnic University, RU
Evgueni Smirnov, Peter the Great St.Petersburg Polytechnic University, RU
Denis Telnov, New Technologies and Services, RU
ICES300: ECLSS Modeling and Test Correlations
The 51st International Conference on Environmental Systems was held in Saint Paul, Minnesota, US, on 10 July 2022 through 14 July 2022.

Keywords

International Space Station, Heating Ventilation and Air-Conditioning (HVAC), Environmental Control and Life Support System (ECLSS), Numerical simulation, Computational Fluid Dynamics

Citation