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)
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.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
ケブラー布の透過速度計測
AA1430003000.pdf
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