Description: Das Projekt "Entwicklung von Entwurfsinstrumenten fuer die Herstellung von Windkraftanlagen mit verringertem aerodynamischen Laerm" wird vom Umweltbundesamt gefördert und von Universität Stuttgart, Institut für Aerodynamik und Gasdynamik durchgeführt. General Information: Objectives The objective of the project is to develop models for quantifying the noise emission from airfoil sections and blades of wind turbines. Special emphasis is laid on the influence of airfoil and blade shape on noise radiation. The models will facilitate the development of design tools enabling manufacturers to take the noise problem into account at an early stage of blade and turbine development. The new models will be used within the project for parametric studies in order to create a database which can be used as a design guideline. A further objective of the project is the development of a Windows-based computer program which allows the design of wind parks with respect to the noise emission in the surroundings. Technical Approach The technical approach follows basically along two lines: (1) a large experimental study with aerodynamic and acoustic measurements in two wind tunnels, (2) a theoretical and numerical approach where state-of-the-art techniques will be used for flow simulations and for the development of new noise prediction models. The experiments will be performed at the National Aerospace Laboratory, NL. Measurements will be taken on seven 2D-sections with currently used airfoils and on five 3D-models (blade tips) of different planforms and sizes. Aerodynamic measurements will use (a) hot-wires to determine the boundary layer characteristics (velocity profile, distribution of turbulent kinetic energy, spectra), (b) miniature pressure transducers to measure the surface pressure fluctuations, (c) five-hole probes to measure the roll-up of the tip vortex behind a blade tip. A balance will allow loads to be determined. Acoustic measurements on a large number of models will use an acoustic antenna. Turbulence grids will be mounted at the nozzle outlet in order to study the influence of incoming turbulence on noise. The flow simulations will take place at the Free University of Brussels (VUB). The formulation of improved models for noise prediction will be undertaken in close co-operation between University of Stuttgart (D), the TNO-Institute of Applied Physics (NL), and VUB (B). Expected Achievements and Exploitation The expected achievements of the project are: - improved models for the relevant noise mechanisms which take the airfoil shape into account, - improved understanding of the noise generation at the blade tip, - design guidelines for reduced aerodynamic noise wind turbines, - Windows-based computer program for wind park design.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Stuttgart ? Fossiler Brennstoff ? Aerodynamik ? Lärmminderung ? Brüssel ? Akustik ? Durchflussmessung ? Lärmemission ? Strömungstechnik ? Windenergie ? Windkraftanlage ? Wind ? Energieverteilung ? Aerodynamisches Geräusch ? Deponie ? Software ? Strömungsgeräusch ? Strahlung ? Windpark ? Prognosemodell ? Studie ? Lärm ? Modellierung ? Simulation ? Stand der Technik ? Bilanz ? Grenzschicht ? Turbulenz ? Datenbank ? Lärmquelle ? Turbomaschine ? other energy topics ? Lärmprognose ? renewable sources of energy ?
Region: Baden-Württemberg
Bounding box: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-01-01 - 1997-12-31
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