Separation safety analysis using CFD simulation and remeshing

The work is aimed to simulate the separation process of a GBU-31 bomb and empty 370 gal fuel tank from an aircraft, using the 6 – Degree Of Freedom (6-DOF) procedure and Computational Fluid Dynamics (CFD) code for body movement. The procedure has an ability to simulate the sequential release from th...

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Bibliographic Details
Published in:Aerospace science and technology 2020-11, Vol.106, p.106190, Article 106190
Main Authors: Olejnik, Aleksander, Dziubiński, Adam, Kiszkowiak, Łukasz
Format: Article
Language:English
Subjects:
6-DOF motion simulation
Computational fluid dynamics
Covert criterion
Store separation
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Summary:The work is aimed to simulate the separation process of a GBU-31 bomb and empty 370 gal fuel tank from an aircraft, using the 6 – Degree Of Freedom (6-DOF) procedure and Computational Fluid Dynamics (CFD) code for body movement. The procedure has an ability to simulate the sequential release from the joints, which is necessary for the lightweight tank separation, in order to avoid a collision with an aircraft. A set of unsteady CFD simulations were calculated. Both the in-house designed 6-DOF procedure and the CFD simulation settings were validated using the wind tunnel experiment data and a Covert criterion for safety separation. Similar approach could be used to analyze the separation of other kinds of external stores and during design the deployment of anti radar chaff, flares or ejection seats. This kind of research is extremely important in the way to improve safety level of flight operations and avoid hazardous situations in the air. This work presents original results obtained by the authors.
ISSN:1270-9638
1626-3219
DOI:10.1016/j.ast.2020.106190