@inproceedings{oai:jaxa.repo.nii.ac.jp:00002945,
 author = {渡辺, 大輔 and 石崎, 匡則 and Watanabe, Daisuke and Ishizaki, Masanori},
 book = {宇宙航空研究開発機構特別資料: 第50回流体力学講演会/第36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 50th Fluid Dynamics Conference / the 36th Aerospace Numerical Simulation Symposium},
 month = {Feb},
 note = {第50回流体力学講演会/第36回航空宇宙数値シミュレーション技術シンポジウム (2018年7月4日-6日. 宮崎市民プラザ), 宮崎市, 宮崎, 50th Fluid Dynamics Conference /the 36th Aerospace Numerical Simulation Symposium (July 4-6, 2018. Miyazaki Citizen's Plaza), Miyazaki, Japan, Linear stability analyses and direct numerical simulations are carried out to investigate the effect of shear layer thickness on Mach wave suppression by helical modes pair in a Mj=2.0 supersonic jet. In the DNS, a jet is forced by random disturbances and a pair of unstable helical modes. The linear stability analyses indicate that decrease of the shear layer thickness increase the growth rate of the helical modes and increase the azimuthal wave number of the helical modes with subsonic phase velocity. Also, the DNS results show that although the radiated Mach waves are reduced as the azimuthal wave number of the added helical modes pair increase, the jet potential core region gets elongated. These results indicate that, in suppression the Mach wave, not only the length of the potential c ore but also the speed of the added disturbance is important., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1830029016, レポート番号: JAXA-SP-18-005},
 pages = {147--151},
 publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)},
 title = {超音速ジェットにおけるヘリカルモードペアを用いたマッハ波抑制のせん断層厚さの影響},
 volume = {JAXA-SP-18-005},
 year = {2019}
}