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AA1530023019.pdf849.73 kB
title一様等方性圧縮性乱流の音源分布
Other TitleSound source distributions in isotropic compressible turbulence
Author(jpn)寺門, 大毅; 野々村, 拓; 佐藤, 允; 藤井, 孝藏
Author(eng)Terakado, Daiki; Nonomura, Taku; Sato, Makoto; Fujii, Kozo
Author Affiliation(jpn)東京大学; 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)
Author Affiliation(eng)The University of Tokyo; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
Issue Date2015-03-25
Publisher宇宙航空研究開発機構(JAXA)
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構特別資料: 第46回流体力学講演会/第32回航空宇宙数値シミュレーション技術シンポジウム論文集
JAXA special publication: Proceedings of the 46th Fluid Dynamics Conference / 32nd Aerospace Numerical Simulation Symposium
VolumeJAXA-SP-14-010
Start page105
End page111
Publication date2015-03-25
Languagejpn
eng
AbstractWe investigate the effects of compressibility on sound source distributions using direct numerical simulations of isotropic decaying compressible turbulence at various turbulent Mach numbers. The sound source is obtained numerically from the Lighthill equation. As a first step, we study the sound source from the Reynolds stress, which is the dominant source in flows at low Mach numbers. We find that, as the Mach number is increased, overall sound source levels are weakened by thecompressibility; however, once the supersonic region appears, sound generation associated with shocklets occurs. This sound generation strengthens the overall sound source levels in the high Mach number turbulence.
Description会議情報: 第46回流体力学講演会/第32回航空宇宙数値シミュレーション技術シンポジウム (2014年7月3日-4日. 弘前文化センター), 弘前市, 青森県
形態: カラー図版あり
Meeting Information: 46th Fluid Dynamics Conference / 32nd Aerospace Numerical Simulation Symposium (July 3-4, 2014. Hirosaki Bunka Center), Hirosaki, Aomori, Japan
Physical characteristics: Original contains color illustrations
Document TypeConference Paper
JAXA Category特別資料
NASA Subject CategoryFluid Mechanics and Thermodynamics
ISSN1349-113X
NCIDAA11984031
SHI-NOAA1530023019
Report NoJAXA-SP-14-010
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/459720


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