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Showing 1 to 13 of 13 for “"Aerodynamic Noise"”.

  1. Prediction of Aerodynamic Noise Generated By Wind Turbine Blades

    Giridhar, RohithUniversity of Kansas2016

    … in the computational study of mitigating the aerodynamic noise generated by wind turbine blades involves accurate prediction of aerodynamic noise generated by a wind turbine rotor which can be used a basis for comparison. The NREL Phase VI HAWT rotor has been chosen to perform this study. This …

    ku Repository record

  2. A computational investigation of flow turbulence as sources of automotive aerodynamic noise

    Hussain, QuaziTexas Tech University1993

    ttu Repository record

  3. An Experimental Investigation of the Turbulent Characteristics of Co-Axial Jet Flows and Their Role in Aerodynamic Noise Generation

    Hammersley, Robert JohnUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-11T17:26:12Z (GMT). No. of bitstreams: 1 7511777.pdf: 6516423 bytes, checksum: 3869c37ae70eb2d6573e38bf31e7d7d2 (MD5) Previous issue date: 1974

    uiuc Repository record

  4. Characterizing The Acoustic Properties Of The Jet Lab At The National Center For Physical Acoustics

    Lieblong, Joshua Anderson2018

    Aerodynamic noise has been a problem since the first use of the jet engine for military aircraft in World War II. For further uses of the jet engine to be possible, problems due to jet noise must be researched and addressed. Anechoic chambers were proposed as a testing facility for research in …

    mississippi Repository record

  5. Numerical techniques for computational aeroacoustics

    Djambazov, Georgi StefanovUniversity of Greenwich1998

    The problem of aerodynamic noise is considered following the Computational Aeroacoustics approach which is based on direct numerical simulation of the sound field. In the region of sound generation, the unsteady airflow is computed separately from the sound using Computational Fluid Dynamics (CFD) …

    greenwich Repository record

  6. TIME-CONSERVATIVE FINITE-VOLUME METHOD WITH LARGE-EDDY SIMULATION FOR COMPUTATIONAL AEROACOUSTICS

    Aybay, OrhanDurham University2010

    … technique to directly predict the near-field aerodynamic noise and to simulate the turbulent flow field with high-fidelity. A three-dimensional parallel LES solver is developed in order to investigate the near acoustic field. Several cases with wide ranges of flow regimes have been computed to …

    durham Repository record

  7. Aerodynamics Analysis of Small Horizontal Axis Wind Turbine Blades by Using 2D and 3D CFD Modelling

    Cao, HanUniversity of Central Lancashire2011

    … much research has concentrated on improving the aerodynamic performance of wind turbine blade through wind tunnel testing and theoretical studies. These efforts are much time consuming and need expensive laboratory resources. However, wind turbine simulation through Computational Fluid Dynamics …

    cent-lancashire Repository record

  8. A Comprehensive Hamiltonian Atmospheric Sound Propagation Model for Prediction of Wind Turbine Noise

    McBride, Sterling M.Virginia Tech2017

    … Thus, the amount of people exposed to wind farm noise is increasing. Due to its broadband amplitude modulated characteristic, wind turbine noise (WTN) is more annoying than noise produced by other common community/industrial sources. Aerodynamic noise along the blade span is the dominant noise …

    vt Repository record

  9. Scattering by porous aerofoil adaptations

    Priddin, MatthewUniversity of Cambridge2022

    … in particular, can generate a large amount of noise that causes disruption and irritation. From the beginning of the jet era, the need to control aeroacoustic noise generation has been important in order to minimise the environmental impact of the aviation industry and its expansion. Sharp …

    cambridge Repository record

  10. A Study of Sound Generated by a Turbulent Wall Jet Flow Over Rough Surfaces

    Grissom, Dustin LeonardVirginia Tech2007

    … without contamination from edge or other aerodynamic noise sources. The facility is capable of generating turbulent boundary layer flows with momentum thickness Reynolds numbers between 450 and 1160. The variation of surface conditions tested cover the range from hydrodynamically smooth …

    vt Repository record

  11. Bio-Inspired Axial Fan Design, 3D Printing Fabrication and Characterization for Noise and Flow Performance Optimization

    Rapisarda, AndreaUniversità degli studi di Trento2026

    Noise pollution from mechanical ventilation systems is an increasingly critical issue in the context of global energy transition, post-pandemic air quality requirements, and stringent environmental acoustic regulations. In this context, axial-flow fans represent a key technological component, …

    trento Repository record

  12. Clean Wing Airframe Noise Modeling for Multidisciplinary Design and Optimization

    Hosder, SerhatVirginia Tech2004

    A new noise metric has been developed that may be used for optimization problems involving aerodynamic noise from a clean wing. The modeling approach uses a classical trailing edge noise theory as the starting point. The final form of the noise metric includes characteristic velocity and length …

    vt Repository record

  13. Aktive Geräuschminderung des Drehklangs axialer Turbomaschinen durch Strömungsbeeinflussung

    Schulz, Jan2004

    … a novel method for the active control of tonal noise in axial turbomachinery. In contrast to conventional techniques, the secondary sound field necessary for cancellation of the primary field is produced without the use of loudspeakers. The field is formed rather through flow induced aerodynamic …

    tu-berlin Repository record