Sökning: "flow-induced vibration"

Hittade 4 uppsatser innehållade orden flow-induced vibration.

  1. 1. Hydroacoustic Modelling of Podded Propulsion System : Underwater Radiated Noise Prediction Using ANSYS

    Master-uppsats, KTH/Teknisk mekanik

    Författare :Martin Persson; [2022]
    Nyckelord :Fluid Mechanics; Computational Aeroacoustics; Frequency Response; Noise and Vibration; Pod; Propulsion System; ANSYS; Reynolds-Averaged Navier-Stokes Equations; Kongsberg Maritime Sweden AB;

    Sammanfattning : Ocean noise pollution is an invisible but growing threat. There are many sources of sound in the ocean but human underwater radiated noise, in particular from shipping is one of the most prominent one. Ocean noise pollution can interfere or sometimes even directly harm marine life. LÄS MER

  3. 2. Using CFD to investigate casue of vibrations in feed-water system

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :Maryam Dabbaghitehrani; [2019]
    Nyckelord :;

    Sammanfattning : Computational fluid dynamics from large scale thermo-hydraulic simulation in 1D to large eddy simulation in 3D, were applied in this master thesis to study cause of vibrations in a feed-water system downstream the connected pumps. In the first step, the fluid flow of the pumps in RELAP5 simulations was disturbed by the blade passing sinusoidal vibrations to study their propagation in the piping system over time. LÄS MER

  4. 3. VIBRATION ANALYSIS OF THE FLUE GAS FAN IN MÄLARENERGI’S UNIT 6 : Troubleshooting using CFD simulations in ANSYS to locate the origin of the vibration spikes and suggest solutions for a more optimized performance

    Master-uppsats, Mälardalens högskola/Akademin för ekonomi, samhälle och teknik

    Författare :Felix Brogren; Peter Gustafsson; [2018]
    Nyckelord :Troubleshoot; CFD simulation; spectrum analysis; flow-induced vibration; vibrations in machinery; Felsökning; CFD-simulering; spektrum analys; flödesinducerad vibration; vibrationer i maskiner;

    Sammanfattning : The purpose of this study is to investigate the flue gas fan in Mälarenergi’s Unit 6 and try to find what is causing the vibrations increase. The Fast Fourier transform (FFT) method was used for this degree project. A comparison was made with previous studies using FFT in order to pinpoint the source of the problem with vibrations. LÄS MER

  5. 4. Study on the Vibrations in the Discharge Pipe of Oil Flooded Screw Compressor

    Magister-uppsats, Blekinge Tekniska Högskola/Avdelningen för maskinteknik

    Författare :Vijay Ravinath; [2006]
    Nyckelord :Screw Compressor; Pulsation; Ducts; Wave separation; FEMLAB.FAMOS.;

    Sammanfattning : Flow induced pulsation in piping are serious concern in refrigeration installations where noise and vibrations are critical factors. This report takes an insight look into the possible ways to minimise the noise and vibration due to pulsations. LÄS MER