@inproceedings{oai:jaxa.repo.nii.ac.jp:00047323,
 author = {榎本, 俊治 and 石井, 達哉 and ENOMOTO, Shunji and ISHII, Tatsuya},
 book = {宇宙航空研究開発機構特別資料: 流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2020オンライン論文集, JAXA Special Publication: Proceedings of Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2020 Online},
 month = {Feb},
 note = {流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2020オンライン (2020年9月28日-30日. 日本航空宇宙学会 : 宇宙航空研究開発機構(JAXA)オンライン会議), Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2020 Online (September 28-30, 2020. The Japan Society for Aeronautical and Space Sciences : Japan Aerospace Exploration Agency (JAXA), Online meeting), In order to investigate the sound absorption phenomenon in sound-absorbing liners used to reduce the noise of aero-jet engines, we simulated the sound absorption liner with glazing flow by the numerical analysis using the sponge region method, and methods to calculate the required sound absorption coefficient was investigated. We compared the conventional method based on sound pressure, the method of calculating the difference in sound power between the upstream and downstream sections using sound intensity, and the method of directly calculating the sound power sucked into the hole. In the absence of glazing flow, all the methods gave similar results. In the case with the glazing flow, it was found that the sound pressure method and the method based on the sound power of the upstream and downstream cross-sections, i.e., the method to acquire the data at a place not affected by the vortex, were more accurate for evaluating the sound absorption coefficient., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA2030013002, レポート番号: JAXA-SP-20-008},
 pages = {11--18},
 publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)},
 title = {グレージング流れを伴う吸音ライナの数値解析による吸音率の評価},
 volume = {JAXA-SP-20-008},
 year = {2021}
}