Study of Self-Excited Pitch Oscillations of Conical-Spherical Body at Mach Number M = 1.75 and Two Moments of Inertia
https://doi.org/10.25205/2541-9447-2023-18-1-43-52
Abstract
Tests of a conical-spherical body in a supersonic wind tunnel were carried out on a free oscillation installation along the pitch angle at a Mach number M = 1.75 and two moments of inertia of the body relative to the axis of rotation. For a body with a large moment of inertia, self-oscillations with the amplitude of ca. 10 deg were obtained. For the first time, the phenomenon of degeneration of self-oscillations for a body with a smaller moment of inertia has been discovered. An attempt was made to model the phenomenon using an ordinary linear differential equation of the first order
Supporting agencies: The work was carried out within the framework of the Program of Fundamental Scientific Research of the State Academies of Sciences for 2021–2023 (project FWNE-2021-0012). The experiments were carried out using the equipment of the Joint Access Center “Mechanics”.
About the Authors
N. A. Mishchenko
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Russian Federation
Russian Federation
Nikita A. Mishchenko, Laboratory Assistant, Khristianovich Institute of Theoretical and Applied
Mechanics SB RAS
Novosibirsk
E. A. Chasovnikov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Russian Federation
Russian Federation
Evgeniy A. Chasovnikov, Candidate of Engineering Sciences, Senior Researcher, Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
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Review
For citations:
Mishchenko N.A., Chasovnikov E.A. Study of Self-Excited Pitch Oscillations of Conical-Spherical Body at Mach Number M = 1.75 and Two Moments of Inertia. SIBERIAN JOURNAL OF PHYSICS. 2023;18(1):43-52. (In Russ.) https://doi.org/10.25205/2541-9447-2023-18-1-43-52
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