Sökning: "Acoustic cavitation"

Hittade 4 uppsatser innehållade orden Acoustic cavitation.

  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. Fluid/Material Coupled Numerical Analysis of Single Bubble Collapse Near a Pit on a Wall

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :Daiki Makii; [2020]
    Nyckelord :Bubble Dynamics; Cavitation Erosion; Numerical Analysis; Fluid Material Coupled Numerical Method; Homogeneous Model; Elastic Body Material; Erosion Pit;

    Sammanfattning : In order to elucidate the progression mechanism of cavitation erosion, the behaviors of a single cavitation bubble collapse near a pit on a wall and both the resulting pressure wave in fluid and stress wave in material are investigated in detail. To find out the mechanism of cavitation erosion, many experimental studies on the bubble collapse behavior near a flat rigid wall and the resulting material damage have been conducted so far. LÄS MER

  4. 3. Ultrasound induced cavitation and resonance amplification using adaptive feedback Control System

    Master-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Författare :Vipul. vijigiri; Taraka Rama Krishna Pamidi; [2014]
    Nyckelord :Acoustic cavitation; optimization; FFT analysis; pure sine excitation; Sonotrode or ultrasonic horn; High intensity ultrasound; Sound pressure level SPL Acoustic pressure field; Feedback control; Master of Science Programme in Electrical Engineering with emphasis on Signal Processing Masterprogram i Elektroteknik med inriktning mot signalbehandling;

    Sammanfattning : Acoustic cavitation in fluids using high powered ultrasound has been of great interest in industries and biomedical engineering. The need for high-intensity focused ultrasound (sound with frequencies between 20 kHz to 10 MHz) and modeling of such systems has drawn great attention in engineering. LÄS MER

  5. 4. Design of an In-vitro Set-up for Sonothrombolysis of human blood clots using microbubbles

    Master-uppsats, KTH/Skolan för teknik och hälsa (STH)

    Författare :Jovana Janjic; [2013]
    Nyckelord :Ultrasound; microbubbles; thrombolysis;

    Sammanfattning : Several studies suggest that the use of ultrasound in conjunction with microbubbles (MBs) can induce the lysis of the blood clots through acoustic cavitation and through the production of microjets and microstreaming. However, there is no accordance about the optimal ultrasound parameters that have to be considered in order to achieve the maximum thrombolytic effect, neither a clear agreement about the type of MBs that have to be used. LÄS MER