Aeronautical Technology Directorate, Japan Aerospace Exploration Agency (JAXA)
Aeronautical Technology Directorate, Japan Aerospace Exploration Agency (JAXA)
Kanazawa Institute of Technology
Kanazawa Institute of Technology
As aircraft noise regulation becomes severe year by year, aFJR (Advanced fan Jet Research) project of JAXA conducted research and development on light weight sound absorption liner technology from 2014 to 2018. In this research, we attempted to develop a method to predict the sound absorption coefficient by numerical analysis of the flow field when glazing flow exists. Assuming laminar and two-dimensional flow, numerical calculation of the flow field with glazing flow and sound wave was performed, and the sound absorption coefficient was evaluated. The sound absorption obtained by the calculation and the sound absorption obtained by the experiment qualitatively agreed well. In the presence of glazing flow, it was found that the sound absorbing cell was not much resonant. The fact that sound absorption occurs even though the sound absorbing cell is not strongly resonating suggests that a phenomenon different from the Helmholtz resonance occurs in the sound absorbing liner having a glazing flow.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
グレージング流れを伴う吸音ライナの数値解析
AA1830029023.pdf
(2.33MB)
