Essays about: "added damping"

Showing result 11 - 15 of 31 essays containing the words added damping.

  1. 11. Experimental Investigation of Added Mass and Damping on a Model Kaplan Turbine for Rotor Dynamic Analysis

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Timmy Nyman; [2018]
    Keywords : Added mass; added damping; rotor dynamics; kaplan turbine; vibrations; fluid dynamics;

    Abstract : The concept of added hydrodynamic properties such as added mass is of importance in modern hydropower development, mainly for rotor dynamic calculations. Added mass could result in reduced natural frequencies and altered mode compared to existing simulation models. READ MORE

  3. 12. Application of the open sourcecode Nemoh for modelling ofadded mass and damping in shipmotion simulations

    University essay from KTH/Marina system

    Author : Emil Andersson; [2018]
    Keywords : ;

    Abstract : Two different numerical tools were considered, the first one is a seakeeping method developed by KTH Ship Dynamics Research Program. It utilizes strip theory and Lewis forms and is further addressed as SMS. READ MORE

  4. 13. Experimental Investigation of Hydrodynamic Effects on a Vibrating Kaplan Runner

    University essay from Luleå tekniska universitet/Strömningslära och experimentell mekanik

    Author : Jakob Hedlund; [2017]
    Keywords : FSI; fluid-solid interactions; Kaplan runner; hydrodynamic; added mass; added damping; vibrations;

    Abstract : An experimental investigation of a vibrating Kaplan turbine runner was performed in order to understand the hydrodynamic effects and to obtain or confirm the mass and damping coefficients used for dimensioning at the design stage. Improved design can lead to increased efficiency and lifetime of hydropower stations. READ MORE

  5. 14. Numerical Investigations of a Partitioned FSI Algorithm for Tetra Pak's Filling Tube

    University essay from Lunds universitet/Institutionen för energivetenskaper

    Author : Leo Andersson; [2016]
    Keywords : fluid-structure interaction; FSI; added mass effect; partitioned implicit scheme; stability; Rayleigh damping; grid flux under-relaxation; Technology and Engineering;

    Abstract : Numerical simulations of fluid-structure interaction of a water-filled tube with a free surface are conducted using an implicit partitioned coupling scheme. Abaqus and STAR-CCM+ are used for the solid- and fluid domains respectively. This application has stability issues, with the most severe turning out to be the added mass effect. READ MORE

  6. 15. Added Properties in Kaplan Turbine - a preliminary investigation

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Stina Bergström; [2016]
    Keywords : Added mass; added damping; fluid-solid interaction; acoustic coupled simulation; two way coupled simulation;

    Abstract : A preliminary investigation of the added properties called added mass, added damping and added stiffness have been performed for a Kaplan turbine. The magnitude of dimensionless numbers have been used in order to classify the interaction of the fluid and the solid. READ MORE