@inproceedings{oai:jaxa.repo.nii.ac.jp:00005960,
 author = {北村, 圭一 and 橋本, 敦 and 村上, 桂一 and 青山, 剛史 and 中村, 佳朗 and Kitamura, Keiichi and Hashimoto, Atsushi and Murakami, Keiichi and Aoyama, Takashi and Nakamura, Yoshiaki},
 book = {宇宙航空研究開発機構特別資料: 航空宇宙数値シミュレーション技術シンポジウム2006論文集, JAXA Special Publication: Proceedings of Aerospace Numerical Simulation Symposium 2006},
 month = {Dec},
 note = {A supersonic jet into complex geometry and its accompanying acoustic field have been investigated by using Euler Equation/Linearized Euler Equation (LEE) hybrid methodology here. As a first step, we have examined its performance by computing traveling sinusoidal waves. Then, we found that the hybrid methodology achieves higher accuracy than the Euler computation when combined with a fifth-order WENO (Weighted Essentially Non-Oscillatory) scheme. Based on this knowledge, we have conducted both of fully third-order Euler/LEE and third-order-Euler/fifth-order-LEE hybrid computations. According to the results, the computed acoustic field is mainly composed of three waves having distinct frequencies: a high frequency wave (0.5 Hz) which seems to be caused by interferences from the wall, a medium frequency wave (2.2 Hz) corresponding to first-mode eigenfrequency of the jet exit geometry, and a low frequency wave (10 Hz). The computed pressure values are rather different between the two results, although these frequencies are not so much. This fact implies that the more we extend the region of fifth-order computation, the more the computed pressure values approach to physically correct ones in quantitative view., 資料番号: AA0063154016, レポート番号: JAXA-SP-06-010},
 pages = {83--88},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {Euler/LEEハイブリッド法による超音速ジェットの音響解析},
 volume = {JAXA-SP-06-010},
 year = {2006}
}