ACOUSTICS OF AERO-ACOUSTIC WIND TUNNELS – STATE OF THE ART
Wind tunnels continue to be used extensively for the development of aerospace vehicles and ground vehicles. An area seeing continued growth is in aero-acoustic testing. For aeronautical vehicles, primarily fixed wing aircraft and rotorcraft, the emphasis is on external noise sources. For ground vehicles, primarily cars and SUVs, the emphasis is on interior noise sources. The main focus of this paper is a general description of the aero-acoustic aspects of wind tunnels. Both open-jet and solid wall wind tunnels will be discussed. First, the genesis of the in-flow and out-of-flow sound pressure level specifications, over the past 20 years, will be outlined. Design concepts used to satisfy the acoustic specifications will be enumerated with examples. Finally, resonance and other acoustic issues will be discussed briefly. The solution techniques used to ameliorate the acoustical issues will be highlighted in this paper.
How to Cite
Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i) to publish, reproduce, distribute, display and store the Contribution;
ii) to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii) to exploit all subsidiary rights in the Contribution,
iv) to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v) to licence any third party to do any or all of the above.