CALCULATION OF ROCKET NOSE FAIRING SHELLS AERODYNAMIC CHARACTERISTICS
https://doi.org/10.26467/2079-0619-2018-21-1-22-29
Abstract
The aerodynamic characteristics of the detachable elements of transport systems are introduced, they allow to calculate the trajectories of these elements after their separation and determine the size of elements impact areas. Special consideration is given to head fairing shells, containing cylindrical, conical and spherical sections. Head fairing shells have high lift-to-drag ratio and the widest impact areas. Aerodynamics of bodies of such configurations has been insufficiently studied. The paper presents the numerical results of modeling the flow around a typical head fairing shell in free flight. Open source OpenFOAM package is used for numerical simulation. The aerodynamic characteristics at trans- and supersonic velocities are obtained, flow pattern transformation with the change of the angle of attack and Mach number is analyzed. The possibility of OpenFOAM package for aerodynamic calculations of thin shells is shown. The analysis of the obtained results demonstrate that there are many complex shock waves interacting with each other at flow supersonic speeds, at subsonic speeds vast regions of flow separations are observed. The authors identify intervals of angles of attack, where different types of flow structures are realized, both for trans- and supersonic flow speeds. The flow pattern change affects the aerodynamic characteristics, the aerodynamic coefficients significantly change with increase of the angle of attack. There are two trim angles of attack at all examined flow velocities. The results obtained can be used to develop a passive stabilization system for fairing shell that will balance the body at the angle of attack with minimum lift-to-drag ratio and will reduce random deviations.
Supporting agencies: Lomonosov Moscow State University, Dyadkin Anatoly Alexandrovich
About the Authors
V. T. Kalugin
Bauman Moscow State Technical University
Russian Federation
Russian Federation
Vladimir T. Kalugin -Doctor of Technical Sciences, Professor, Professor of Dynamics and Flight Control Chair, BMSTU.
Moscow
A. Y. Lutsenko
Bauman Moscow State Technical University
Russian Federation
Russian Federation
Alexander Y. Lutsenko - Candidate of Technical Sciences, Associate Professor, Associate Professor of Dynamics and Flight Control Sub-Department, BMSTU.
Moscow
D. K. Nazarova
Bauman Moscow State Technical University
Russian Federation
Russian Federation
Dinara K. Nazarova - Postgraduate Student of Dynamics and Flight Control Sub-Department, BMSTU.
Moscow
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For citations:
Kalugin V.T., Lutsenko A.Y., Nazarova D.K. CALCULATION OF ROCKET NOSE FAIRING SHELLS AERODYNAMIC CHARACTERISTICS. Civil Aviation High Technologies. 2018;21(1):22-29. (In Russ.) https://doi.org/10.26467/2079-0619-2018-21-1-22-29
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