|Statement||Lecture series directors, G. Comte-Bellot & D. Olivari.|
|Series||Lecture series / Von Karman Institute for Fluid Dynamics -- 1997-07, Lecture series (Von Karman Institute for Fluid Dynamics) -- 1997-02.|
|Contributions||Comte-Bellot, Geneviève, Olivari, D., Von Karman Institute for Fluid Dynamics.|
|LC Classifications||TL574.N6 A145 1997|
|The Physical Object|
|Pagination||1 v. (various pagings) :|
Active Control of Low-Speed Fan Tonal Noise Using Actuators Mounted in Stator Vanes: Part 1 Control System Design and Implementation Paul Remington, Daniel Sutliff and. The development of physics-based noise prediction tools for analysis of aerodynamic noise sources is of paramount importance since noise regulations have become more stringent. Direct simulation of aerodynamic noise remains prohibitively expensive for engineering problems because of the resolution requirements. Therefore, hybrid approaches that consist of predicting nearfield flow quantities. – Metamaterials and Active Metamaterials for High Performance Noise Control J Cheer – Lunch – Active Control of Structurally Radiated Sound M J Brennan – Workshop P F Joseph & M J Brennan NOISE CONTROL Wednesday 9 September (Advanced Day 1) – Introduction to Aeroacoustics R H Self. Turbulent Jet Noise: Shear noise, Self-noise, and Entropic Contributions Jonathan Freund Jet Jet Aeroacoustics: Modeling I • Monday, 17 June • hrs.
American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Aeroacoustics is the discipline devoted to the study of aerodynamic noise, to its propagation in generally non-homogeneous media, its radiation in far field and also ways to reduce noise by active control of sound field or more directly by control of sources of sound. Only the generation and propagation in gases is retained here. Overview of Lecture • Noise Sources and Generation Mechanisms – Sources of Noise for Typical Fans – Fluid-Structure Interaction as a Noise Generation Mechanism – Coupling to the Duct: Propagating Modes and Cut-off Phenomena • Modeling of Fan Noise The Acoustic Analogy Computational Methods:Aeroacoustics and UnsteadyAerodynamics The Linear Cascade Model. Reduction of Axial Turbomachinery Tonal Noise by Means of Flow Induced Secondary Sources Using an Extremum-Seeking Control Technique International Journal of Aeroacoustics, Vol. 6, No. 1 Active Blade Tone Control in Axial Turbomachines by Flow Induced Secondary Sources in .
The author gives a comprehensive overview of materials and components for noise control and acoustical comfort. Sound absorbers must meet acoustical and architectural requirements, which fibrous or porous material alone can meet. Basics and applications are demonstrated, with representative examples for spatial acoustics, free-field test facilities and canal linings. A comprehensive guide to wind farm noise prediction, measurement, assessment, control and effects on people. Wind Farm Noise covers all aspects associated with the generation, measurement, propagation, regulation and adverse health effects of noise produced by large horizontal-axis wind turbines of the type used in wind farms. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Computational Aeroacoustics (CAA) is a rapidly developing new technology that allows computation of the generation and propagation of sound from first principle governing equations. This paper discusses the application of this technique to environmental noise control, such as in the interior of a space station.