Emneside for ING2305 Fluid- og hydrodynamikk

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The course shall provide good knowledge on incompressible and compressible fluid mechanics, both static and dynamic. Of great importance is knowledge in fluid-structure-interaction, for example cavitation and pressure signature. Through laboratory exercises in a cavitation tunnel and tow tank, the cadets gain practical experience with experimentation and analysis of measurement data. The cadets shall acquire the background to be able to handle operation and maintenance issues within naval and marine engineering. The course shall provide good knowledge for subsequent application in the other technical specialisation subjects and a good basis for further studies.

The course covers the following academic content: properties of fluids (density, pressure, shearing stress, viscosity, compressibility, vapor pressure and cavitation), fluid statics (pressure variation in liquids and gases, hydrostatic pressure equation, manometry, hydrostatic force on a plane or curved surface, buoyancy, centre of buoyancy and stability), elementary fluid dynamics (Newton’s second law along a streamline and normal to a streamline, the Bernoulli equation, mass flowrate and volume flowrate, continuity equation for pipe flow, Pitot-static tube, Venturi meter), fluid kinematics (velocity field, streamlines, streaklines, material derivative, acceleration field), control volume and conservation laws (continuity equation in integral form, linear momentum equation, angular momentum equation, shaft power equation), differential analysis of fluid motion (divergence, curl and rotation, continuity equation and linear momentum equation in differential form, Euler’s equations of motion, the Navier-Stokes equations, irrotational flow, the Bernoulli equation for irrotational flow, velocity potential, potential flow), dimensional analysis and modeling theory (dimensionless numbers, the Buckingham pi theorem, the method of repeating variables, modeling laws), viscous flow (laminar and turbulent flow, boundary layer, pipe flow, pressure drop, head loss, friction factor, relative roughness, Moody chart, flow in inclined pipes, Poiseuille’s law, external flow, drag and lift on submerged bodies, drag, lift, and pressure coefficients, Biot-Savart’s law, the Kutta-Joukowski theorem, the Magnus effect), compressible flow (the Bernoulli equation for compressible flow, Mach number relations, nozzle, diffuser, stagnation properties, Fanno-Rayleigh diagram).

The course follows STCW code A-III/2 and STCW function Marine engineering at the management level.