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Design and Characterization of the U...

Chow, Derrick H.F.

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Design and Characterization of the UTIAS Anechoic Wind Tunnel.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Design and Characterization of the UTIAS Anechoic Wind Tunnel./
作者:	Chow, Derrick H.F.
面頁冊數:	82 p.
附註:	Source: Masters Abstracts International, Volume: 55-04.
Contained By:	Masters Abstracts International55-04(E).
標題:	Aerospace engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10043015
ISBN:	9781339552576

Design and Characterization of the UTIAS Anechoic Wind Tunnel.
Chow, Derrick H.F.

Design and Characterization of the UTIAS Anechoic Wind Tunnel. - 82 p.

Source: Masters Abstracts International, Volume: 55-04.

Thesis (M.A.S.)--University of Toronto (Canada), 2016.

The anechoic open-jet wind tunnel facility at the University of Toronto Institute for Aerospace Studies was updated and characterized to meet the needs of current and future aeroacoustic experiments. The wind tunnel inlet was resurfaced and flow-conditioning screens were redesigned to improve the freestream turbulence intensity to below 0.4% in the test section. The circular nozzle was replaced with a square secondary contraction that increased the maximum test section velocity to 75 m/s and improved flow uniformity to over 99% across a usable cross-sectional area of 500 mm x 500 mm. Acoustic baffles were installed in front of the wind tunnel inlet and foam wedges were installed in the anechoic chamber. The overall background sound pressure levels in the chamber were improved by 8-18 db over the range of operational freestream velocities. The anechoic chamber cut-off frequency is 170 Hz and the reverberation time for a 60 dB sound power decay is 0.032 s.

ISBN: 9781339552576Subjects--Topical Terms:

1002622
Aerospace engineering.

Design and Characterization of the UTIAS Anechoic Wind Tunnel.
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520 $a The anechoic open-jet wind tunnel facility at the University of Toronto Institute for Aerospace Studies was updated and characterized to meet the needs of current and future aeroacoustic experiments. The wind tunnel inlet was resurfaced and flow-conditioning screens were redesigned to improve the freestream turbulence intensity to below 0.4% in the test section. The circular nozzle was replaced with a square secondary contraction that increased the maximum test section velocity to 75 m/s and improved flow uniformity to over 99% across a usable cross-sectional area of 500 mm x 500 mm. Acoustic baffles were installed in front of the wind tunnel inlet and foam wedges were installed in the anechoic chamber. The overall background sound pressure levels in the chamber were improved by 8-18 db over the range of operational freestream velocities. The anechoic chamber cut-off frequency is 170 Hz and the reverberation time for a 60 dB sound power decay is 0.032 s.
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