Analysis of added mass in cavitating flow
Language
en
Article de revue
This item was published in
Journal of Fluids and Structures. 2012-05, vol. 31, p. 30-48
ELSEVIER
English Abstract
The paper addresses a theoretical study of the added mass effect in cavitating flow.The cavitation is considered to induce a strong time–space variation of the fluid density at the interface between an inviscid fluid and ...Read more >
The paper addresses a theoretical study of the added mass effect in cavitating flow.The cavitation is considered to induce a strong time–space variation of the fluid density at the interface between an inviscid fluid and a three-degree-of-freedom rigid section. The coupled problem is then simplified to a Laplace equation written for the pressure with aboundary condition at the fluid–structure interface depending on the acceleration, the velocity of the structure and on the rate of change of flow density. It is shown that contrary to the homogeneous flow, the added mass operator is not symmetrical and depends on the flow through fluid density variation. The added mass coefficients decrease as the cavitation increases which should induce an increase of the natural structural frequencies. The model shows also an added damping operator related to the rate of change of flow density. Added damping coefficients are found to be positive ornegative according to the rate of change of the fluid density, indicating the possibility of instability development between flexible structures and unsteady cavitating flows.Read less <
English Keywords
Fluid–structure interaction
Cavitation induced vibrations
Added mass
Origin
Hal imported