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Other TitleMeasurement of Transpiration Velocity through Kevlar Cloth
Author(jpn)伊藤, 美月; 石橋, 孝介; 森, 浩一; 中村, 佳朗; 橋本, 敦; 浦, 弘樹
Author(eng)Ito, Mitsuki; Ishibashi, Kosuke; Mori, Koichi; Nakamura, Yoshiaki; Hashimoto, Atsushi; Ura, Hiroki
Author Affiliation(jpn)名古屋大学; 名古屋大学; 名古屋大学; 名古屋大学; 宇宙航空研究開発機構航空本部数値解析技術研究グループ(JAXA); 宇宙航空研究開発機構航空本部風洞技術開発センター(JAXA)
Author Affiliation(eng)Nagoya University; Nagoya University; Nagoya University; Nagoya University; Numerical Simulation Research Group, Institute of Aeronautical Technology, Japan Aerospace Exploration Agency (JAXA); Wind Tunnel Technology Center, Institute of Aeronautical Technology, Japan Aerospace Exploration Agency (JAXA)
Issue Date2014-09-15
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構研究開発資料
JAXA Research and Development Memorandum
Start page1
End page5
Publication date2014-09-15
In order to measure aeroacoustic noise in wind tunnel, a Kevlar wall technique is proposed. The Kevlar wall can keep the flow in the test section and it is acoustically transparent. JAXA installed the Kevlar wall in the test section of 2m×2m low speed wind tunnel. We measured transpiration velocities through Kevlar clothes for wall interference correction. It is found that the relationship between differential pressure and transpiration velocity can be modeled with an equation proposed by Devenport et al. Non-dimensional constants of the equation were obtained for two types of Kevlar clothes, and the transpiration velocities were modeled. In addition, the Kevlar cloth is stretched when it is used in wind tunnel, and therefore effects of the tension on the transpiration velocity were also investigated. However, we found that the tension does not affect the transpiration velocities.
Description形態: カラー図版あり
Physical characteristics: Original contains color illustrations
Document TypeTechnical Report
JAXA Category研究開発資料
NASA Subject CategoryAcoustics
Report NoJAXA-RM-14-001

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