Numerical investigation on sonic boom reduction with non-axisymmetric body shapes

H. Yamashita, S. Obayashi

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

This study describes the possibility for reducing the sonic boom by the use of non-axisymmetric body shapes, which are expected to more efficiently take advantage of the cut-off phenomenon of the atmosphere. If the propagation of high pressure shock waves can be restricted above the cut-off range, the sonic boom heard on the ground can be considerably alleviated. Therefore, a non-axisymmetric body shape was employed to create this asymmetric propagation of near-field pressure waves. In this paper, Triangle body, Diamond body, and four ideal bodies of revolution are studied and their initial boom intensities were compared. Near-field pressure and sonic boom signatures are examined quantitatively, using Computational Fluid Dynamics (CFD) in inviscid flow (Euler) mode and the Waveform Parameter Method. As for the results, the Triangle body in lift condition realized the asymmetric propagation and also the utilization of the cut-off phenomenon, thus alleviating the boom intensity on the ground as much as the 1/4th power body with a blunted-nose shape at no-lift condition.

本文言語English
ホスト出版物のタイトル46th AIAA Aerospace Sciences Meeting and Exhibit
出版社American Institute of Aeronautics and Astronautics Inc.
ISBN(印刷版)9781563479373
DOI
出版ステータスPublished - 2008

出版物シリーズ

名前46th AIAA Aerospace Sciences Meeting and Exhibit

ASJC Scopus subject areas

  • 航空宇宙工学

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