Publication

Identification of Hydrodynamic Damping of Runner Blade Vibrations Using Numerical Simulations

2008
Student Projects

Abstract

With the development of numerical tools used to simulate fluid-structure interactions phenomena, investigations on hydrodynamic damping are now more accessible and the studied cases are more flexible. The aim of the present study is, at first, to analyze the hydrodynamic damping on a simple blade placed in water using ANSYS and CFX codes to simuate the fluid-structure interaction. The influences of the velocity, the amplitude of the vibrations and the material properties are investigated. Secondly, by placing many adjacent blades vibrating, firstly, in opposite phase and then in phase, the influence of the vibration phase on the hydrodynamic damping value is analyzed.

Official source

https://infoscience.epfl.ch/entities/publication/5ee10f7a-278f-4cb5-a9f5-046b87808db4

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2008
Student Projects

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5ee10f7a-278f-4cb5-a9f5-046b87808db4

About this result

Related concepts (24)

Numerical analysis

Numerical analysis is the study of algorithms that use numerical approximation (as opposed to symbolic manipulations) for the problems of mathematical analysis (as distinguished from discrete mathematics). It is the study of numerical methods that attempt at finding approximate solutions of problems rather than the exact ones. Numerical analysis finds application in all fields of engineering and the physical sciences, and in the 21st century also the life and social sciences, medicine, business and even the arts.

Computational fluid dynamics

Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problems that involve fluid flows. Computers are used to perform the calculations required to simulate the free-stream flow of the fluid, and the interaction of the fluid (liquids and gases) with surfaces defined by boundary conditions. With high-speed supercomputers, better solutions can be achieved, and are often required to solve the largest and most complex problems.

Materials science

Materials science is an interdisciplinary field of researching and discovering materials. Materials engineering is an engineering field of finding uses for materials in other fields and industries. The intellectual origins of materials science stem from the Age of Enlightenment, when researchers began to use analytical thinking from chemistry, physics, and engineering to understand ancient, phenomenological observations in metallurgy and mineralogy. Materials science still incorporates elements of physics, chemistry, and engineering.

Related publications (12)

Identification of Hydrodynamic Damping of Runner Blade Vibrations Using Numerical Simulations

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