Open AccessAbout the Dynamic Damping Coefficients of a Segmental-Cone Model at Mach M = 2.3.
Author(s) -
N. P. Adamov,
N. A. Mishchenko,
E. A. Chasovnikov
Publication year - 2022
Publication title -
sibirskij fizičeskij žurnal
Language(s) - English
Resource type - Journals
ISSN - 2541-9447
DOI - 10.25205/2541-9447-2022-17-1-34-46
Subject(s) - mach number , amplitude , oscillation (cell signaling) , physics , nonlinear system , polynomial , conical surface , function (biology) , thermoelastic damping , mechanics , limit (mathematics) , mathematical analysis , mathematics , optics , geometry , thermodynamics , genetics , quantum mechanics , evolutionary biology , thermal , biology
In order to describe the nonlinear behavior of oscillation amplitude of the segmental-conical model on a transversive rod setup in a wind tunnel at Mach М = 2, a polynomial function of damping derivatives was used. Polynom of the 4th degree as a function of viscous damping allowed to describe two limit cycles observed in experiments. Coefficients of the polynom were determined and showed sufficient agreement with a direct numerical solution of the proposed dynamic equation.