Abstract
A method for treating experimental data obtained on a setup with free oscillations over the pitching angle of the model and for determining the unsteady aerodynamic characteristics of the pitching moment coefficient is described. It is found that the pitching moment coefficient of a re-entry vehicle model at Mach numbers M = 2 and 2.25 and fixed angles of attack a depends non-linearly on the rate of change of the angle α. This circumstance makes the concept of aerodynamic derivatives inappropriate for mathematical description of the pitching moment coefficient.
Similar content being viewed by others
References
C.D. Kazemba, R.D. Braun, L.G. Clark, and M. Schoenenberger, Survey of blunt-body dynamic stability in supersonic flow, AIAA Paper, 2012, No. 2012–4509, P. 1–27.
N.P. Adamov, A.M. Kharitonov, E.A. Chasovnikov, A.A. Dyadkin, A.N. Krylov, and E.N. Aleksandrov, Experimental study of aerodynamic characteristics of the re-entry vehicle model on the free-vibration facility at supersonic speeds, Thermophysics and Aeromechanics, 2016, Vol. 23, No. 6, P. 791–800.
N.P. Adamov and E.A. Chasovnikov, Some features of free oscillations of the re-entry vehicle model at Mach number M = 2, in: Materials of the XV All-Russian SibNIA School-Seminar “Aerodynamics and Flight Dynamics of Aircraft”, Novosibirsk, SibNIA, 2017, P. 6–7.
E.A. Chasovnikov and S.A. Chasovnikov, Methods for determining the equivalent aerodynamic damping of reentry vehicle models during tests on the free-vibration facility, Thermophysics and Aeromechanics, 2019, Vol. 26, No. 1, P. 1–8.
B. Redd, D.M. Olsen, and R.L. Barton, Relationship between the aerodynamic damping derivatives measured as a function of instantaneous angular displacement and the aerodynamic derivatives measured as a function of oscillation amplitude, NASA-TN-D-2855, 1965, 16 p.
S.M. Murman, Dynamic viscous simulations of atmospheric-entry capsules, AIAA Paper, 2008, No. 2008–6911, P. 1–21.
S. Teramoto, K. Fudjii, and K. Hiraki, Numerical analysis of dynamic instability at transonic speeds, The Institute of Space and Astronautical Sci., Report SP 2003, No. 17, P. 275–300.
T. Abe, S. Sato, Y. Matsukawa, K. Yamamoto, and K. Hiraoka, Study for dynamically unstable motion of reentry capsule, Institute of Space and Astronautical Sci., Report SP, 2003, No. 17, P. 301–332.
E.A. Chasovnikov, Mathematical modeling of unsteady aerodynamic characteristics of load-bearing systems in stalling regimes, Dokl. Siberian Branch of the Academy of Sciences of Higher School, 2003, No. 2, P. 77–86.
C.H. Whitlock and P.M. Siemers, Parameters influencing dynamic stability characteristics of viking-type entry configurations at Mach 1.76, J. Spacecraft and Rockets, 1972, Vol. 9, No. 7, P. 558–560.
Author information
Authors and Affiliations
Corresponding author
Additional information
This work was performed as part of the Program of Fundamental Scientific Research of the State Academies of Sciences for the years 2013–2020 (Project 22.6.4. Computational and experimental studies of unsteady phenomena in inhomogeneous supersonic flows); the experiments were carried out on the basis of the CUC “Mechanics”.
Rights and permissions
About this article
Cite this article
Chasovnikov, E.A. Specific features of the aerodynamic moment and the pitch damping of a re-entry vehicle model exercising free oscillations at supersonic speeds. Thermophys. Aeromech. 27, 331–338 (2020). https://doi.org/10.1134/S0869864320030026
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0869864320030026