On the Stability of Rotating Cylinder Conveying Flow in an External Fluid Medium

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Hojjati, Mohammad | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44773 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Dehghani Firoozabadi, Rouhollah
Abstract:
The present study aims at investigating the stability of flexible spinning cylinders conveying flow in an external fluid Medium. Using the linearized Navier-Stokes equations for the flow, a two-dimensional model is developed governing the fluid motion. The resultant force exerted on the flexible cylinder wall due to the fluid interactions is calculated as a function of the lateral acceleration. Applying the Hamilton principle, the governing equations of flexural vibration of the rotary flexible cylinder mounted on simply supported axles are derived. Having the forces due to the conveying fluid calculated and substituting into the governing equations, a coupled field governing equations of the system are obtained. An analytical solution is devised for the stability analysis and some examples are presented. The effects of radius and mass ratio on the stability margins are also examined
Keywords:
Rotors ; Stability ; Impressed Current ; Structure Dynamics ; Conveying Flow ; Fluid-Fluid Interaction

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