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Aero-elastic oscillations of circle cylinder with power takeoffстатья
- Авторы: Andronov Peter R., Guvernyuk Sergey V., Dynnikova Galina G.Ya
- Сборник: Proceedings of the Second International Symposium on Flutter and its Application. ISFA 2020
- Год издания: 2020
- Место издания: CNRS-Ecole Polytechnique Paris, France
- Первая страница: 431
- Последняя страница: 431
- Аннотация: Possibility of power takeoff from bodies performing resonant aero-elastic vibrations is of great interest. The problem of transverse self-oscillations of circular cylinders with viscoelastic bonds in an unlimited flow of a viscous incompressible fluid is investigated. The task is solved in a complete conjugate formulation. The meshless non-iterative method was used for solving the problem. A fluid and a moving solid are described as a single dynamic system without splitting into successive dynamic and hydrodynamic stages. The motion of a fluid is modeled using two-dimensional Navier-Stokes equations with no-sleep boundary conditions on the bodies surface. The time-dependence of cylinder center yc(t) is found. The transverse hydrodynamic force Fy is determined via integral expressions depending on yc(t), non-zero component of vorticity and flow of vorticity from the bodies surface. As a result the undamped self-oscillations of a cylinder in a flow have been reproduced. The mechanism of self-supporting of the auto-oscillations is identified and described in details. The comparison with the available data from other works was made, that confirms suitability of the developed technology. It was found that when the natural frequency of the cylinder oscillations approaches the hydrodynamic frequency of the Karman street, a resonant increase in the amplitude of self-oscillations occurs (Sh=0.199). Power takeoff dependence on the friction coefficient c and on the stiffness coefficient k is investigated. This work has been supported by the Russian Foundation for Basic Research (project 18-31-20057).
- Добавил в систему: Андронов Петр Роальдович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Aero-elastic_oscillations_of_circle_cylinder_with_power_tak… | Aero-elastic_oscillations_of_circle_cylinder_with_power_tak… | 1,0 МБ | 11 сентября 2020 [Dynnikova] | |
| 2. | Aero-elastic_oscillations_of_circle_cylinder_with_power_tak… | Aero-elastic_oscillations_of_circle_cylinder_with_power_tak… | 1,0 МБ | 11 сентября 2020 [andronov107] |