Sökning: "inviscid flow"

Hittade 5 uppsatser innehållade orden inviscid flow.

  1. 1. Efficient seakeeping performance predictions with CFD

    Master-uppsats, KTH/Marina system

    Författare :Benjamin Lagemann; [2019]
    Nyckelord :added wave resistance; CFD; Courant-adapted time step; Euler ˛flow; FINE Marine; inviscid flow; k-ω SST-Menter; KVLCC2; RANS; regular waves; seakeeping; sub-cycling acceleration; time discretization; viscous flow;

    Sammanfattning : With steadily increasing computational power, computational fluid dynamics (CFD) can be applied to unsteady problems such as seakeeping simulations. Therefore, a good balance between accuracy and computational speed is required. LÄS MER

  3. 2. On Steady Ideal Flows with Nonvanishing Vorticity in Cylindrical Domains

    Master-uppsats, Lunds universitet/Matematik (naturvetenskapliga fakulteten)

    Författare :Douglas Svensson Seth; [2016]
    Nyckelord :Partial Differential Equations; Euler Equations; Fluid Dynamics; Mathematics and Statistics;

    Sammanfattning : A paper by Alber shows the existence of steady, inviscid incompressible flows with nonvanishing vorticity for general three-dimensional domains with smooth boundary. In this thesis we show the existence of such flows in cylindrical domains under the conditions that there is no flow through the side of the cylinder, nonzero flow into the cylinder at all points in the bottom, and nonzero flow out of the cylinder at all points in the top. LÄS MER

  4. 3. Establishment of an open 3D steam turbine flutter test case

    Master-uppsats, KTH/Energiteknik

    Författare :Di Qi; [2016]
    Nyckelord :;

    Sammanfattning : An open three-dimensional (3D) flutter test case for steam turbines is presented. Unlike previous research on turbine flutter, the geometry is an open resource and is from a test case originally presented by Durham University. LÄS MER

  5. 4. Aerodynamics of Flutter

    Master-uppsats, KTH/Mekanik

    Författare :Emelie Barman; [2011]
    Nyckelord :;

    Sammanfattning : The unsteady ow around an aerofoil placed in a uniform ow stream with an angle of attack is investigated, under the assumption of inviscid, incompressible, two-dimensional flow. In particular, a function of the velocity jump over the wake is achieved, where this function depends on the horizontal displacement and time. LÄS MER

  7. 5. Development of Body and Viscous Contribution to a Panel Program for Potential Flow Computation : Aero Dynamic Analysis and Preliminary Design Tool

    Magister-uppsats, Institutionen för konstruktions- och produktionsteknik

    Författare :Erik Nordin; [2006]
    Nyckelord :Flygteknik; Aerodynamik; Potentiellströmning; Panelprogram; Kroppsmodell; Gränsskiktsmodell;

    Sammanfattning : The aim of this thesis was to develop a potential flow calculation model which includes computation of flow around aircraft bodies (fuselage, engines) and a boundary layer method which calculates the viscous effects over the aircraft wings. The models developed will be merged with an already existing panel program developed by Saab, Linköping, Sweden. LÄS MER