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This book deals with the dynamics of slender, mainly cylindrical or quasi-cylindrical, bodies in contact
with axial flow—such that the structure either contains the flow or is immersed in it, or both. Dynamics
is used here in its generic sense, including aspects of stability, thus covering both self-excited and free or
forced motions associated with fluid-structure interactions in such configurations. Indeed, flow-induced
instabilities—instabilities in the linear sense—namely, divergence and flutter—are a major concern
of this book. However, what is rather unusual for books on flow-induced vibration, is that considerable
attention is devoted to the nonlinear behaviour of such systems, e.g. on the existence and stability of
limit-cyclemotions, and the possible existence of chaotic oscillations. This necessitates the introduction
and utilization of some of the tools of modern dynamics theory.
Engineering examples of slender systems interacting with axial flow are pipes and other flexible
conduits containing flowing fluid, heat-exchanger tubes in axial flow regions of the secondary fluid
and containing internal flow of the primary fluid, nuclear reactor fuel elements, monitoring and control
tubes, thin-shell structures used as heat shields in aircraft engines and thermal shields in nuclear reactors,
jet pumps, certain types of valves and other components in hydraulic machinery, towed slender ships,
barges and submarine systems, towed acoustic arrays used in underwater oil and gas exploration, brine
strings in salt caverns used for storage of hydrocarbons, etc. Physiological examples may be found in
the pulmonary and urinary systems and in haemodynamics. |
