Investigation of the Components of the NAL High Reynolds Number Two-Dimensional Wind Tunnel, Part IV Design, Construction and Performance of the Exhaust Silencer
Second Aerodynamics Division, National Aerospace Laboratory(NAL)
Second Aerodynamics Division, National Aerospace Laboratory(NAL)
Second Aerodynamics Division, National Aerospace Laboratory(NAL)
Second Aerodynamics Division, National Aerospace Laboratory(NAL)
出版者
航空宇宙技術研究所
出版者（英）
National Aerospace Laboratory(NAL)
雑誌名
航空宇宙技術研究所報告
雑誌名(英)
Technical Report of National Aerospace Laboratory TR-606
巻
606
ページ
17
発行年
1980-04
抄録（英）
This paper presents a description of the design, construction and performance of the exhaust silencer for the NAL high Reynolds number two-dimensional transonic blow down wind tunnel, which was completed in October 1979. The silencer is a twostoried construction made of reinforced concrete, 40M long, 10M wide and 19M high, and entirely enclosed by thick concrete walls. The upstream part of the first story, particularly, is covered with double walls, the thickness of the two walls being 0.3M(inner wall) and 0.2M(outer wall), respectively. A noise reduction system using three kinds of parallel baffles and two kinds of lined bends is adopted for the wind tunnel exhaust noise.
二次元風胴構成要素の研究(Ⅳ)-消音装置の設計と性能試験-
naltr00606.pdf
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