Numerical Modeling of a Rack Ventilation Characteristics for the International Space Station on Orbit Operation



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45th International Conference on Environmental Systems


The goal of the study is to analyze the airflow in a rack for the International Space Station. The most of the rack has numerous equipments and ducts inside that gives a difficult path for an appropriate ventilation. To study the rack internal airflow structure, a detailed 3D Computational Fluid Dynamics analysis for ventilation characteristics in the avionics rack has been developed. Air velocity fields were numerically predicted on the basis of the 3D Reynolds-Averaged Navier-Stokes (RANS) approach using ANSYS Fluent software. It was found that intensive air jets from the avionics equipment exhausts form sufficient air circulation throughout the rack volume. In all the regions of the rack, the velocity values do not fall down below the lower limit. The computational data obtained could serve as the basis for additional verification of the rack equipment arrangement. It proves that a perfect mixing assumption could be used for any gas concentration gradient in the rack.


Bellevue, Washington
Chang H. Son, The Boeing Company, USA
Nikolay G. Ivanov, St. Petersburg Polytechnic University, Russia
Evgueni M. Smirnov, St. Petersburg Polytechnic University, Russia
Denis S. Telnov, New Technologies and Services, St. Petersburg, Russia
The 45th International Conference on Environmental Systems was held in Bellevue, Washington, USA on 12 July 2015 through 16 July 2015.