@inproceedings{9fbeb9903f524b6cad4cf4ae19ad099d,
title = "Mach wave suppression by a pair of subsonic helical modes in a supersonic jet",
abstract = "The three-dimensional compressible Navier-Stokes equations are numerically solved to study an efficient means for suppression of the Mach wave emissions in a supersonic round jet at high Mach numbers using high-order compact upwind schemes. Two types of the inflow perturbations for the jet Mach number of MJ=2.0 are tested. The first case is the jet flow forced randomly, which is the base flow jet in this study. The second case is the jet flow forced by random disturbances and a pair of unstable 3rd helical modes (m=±3) (non-radiating) with a subsonic phase speed. The numerical results show that the potential core of the jet flow forced by the non-radiating modes closes sooner than the base flow jet. Therefore, the intense Mach wave radiations observed in the randomly forced jet can be significantly reduced by adding a pair of 3rd helical non-radiating modes.",
author = "Daisuke Watanabe and Hiroshi Maekawa",
note = "Publisher Copyright: {\textcopyright} 2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.; 25th AIAA/CEAS Aeroacoustics Conference, 2019 ; Conference date: 20-05-2019 Through 23-05-2019",
year = "2019",
doi = "10.2514/6.2019-2754",
language = "英語",
isbn = "9781624105883",
series = "25th AIAA/CEAS Aeroacoustics Conference, 2019",
publisher = "American Institute of Aeronautics and Astronautics Inc, AIAA",
booktitle = "25th AIAA/CEAS Aeroacoustics Conference, 2019",
}