@techreport{oai:jaxa.repo.nii.ac.jp:00044861, author = {榊原, 盛三 and 三輪, 等 and 萱場, 重男 and 佐藤, 衛 and SAKAKIBARA, Seizo and MIWA, Hitoshi and KAYABA, Shigeo and SATO, Mamoru}, month = {Apr}, note = {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., 資料番号: NALTR0606000, レポート番号: NAL TR-606}, title = {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-}, year = {1980} }