Sound Generation in Compressible Mixing Layers

• 資料種別: 記事
• タイトル: Sound Generation in Compressible Mixing Layers
• 著者・編者: Ye Li; Mamoru Tanahashi; Toshio Miyauchi
• 著者標目: Ye Li; Mamoru Tanahashi; Toshio Miyauchi
• タイトル（掲載誌）: JSME international journal. Ser. B, Fluids and thermal engineering
• 巻号年月日等（掲載誌）: 44(4) 2001.11
• 掲載巻: 44
• 掲載号: 4
• 掲載ページ: 505～512
• 掲載年月日（W3CDTF）: 2001-11
• ISSN（掲載誌）: 1340-8054
• ISSN-L（掲載誌）: 1340-8054
• 出版事項（掲載誌）: Tokyo : Japan Society of Mechanical Engineers
• 出版地（国名コード）: JP
• 本文の言語コード: eng
• 件名標目: Computational Fluid Dynamics; Numerical Analysis; Compressible Flow; Noise; Shear Flow; Acoustic Source Terms; Direct Numerical Simulation; Acoustic Analogy
• NDLC: ZN11
• 対象利用者: 一般
• 所蔵機関: 国立国会図書館
• 請求記号: Z53-Y271
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 5978490; http://id.ndl.go.jp/bib/5978490
• 整理区分コード: 632

• 要約等: Direct numerical simulations have been performed to clarify the sound generation mechanism in a two-dimensional temporally evolving compressible mixing layers. The sound generation in mixing layer is governed by the variations of vorticity which are induced by the Kelvin-Helmholtz instability. The pressure fluctuations with high frequency are observed in the period of vortex roll-up, and the amplitude of pressure fluctuations increase on the occasion of vortex pairing. The acoustic source term is governed by the Reynolds stress component and the viscous component is negligible. The effects of convective Mach number Mc on sound generation are also investigated. Both the pressure fluctuations and acoustic source term increase with the increase of convective Mach number. For Mc=0.6, shock wave called'eddy shocklet, is produced by the vortex pairing, which dominates the sound generation from the mixing layer at high Mc. The far-field sound computed by DNS is compared with the predictions based on the acoustic analogies derived by Powell and Lighthill. The prediction by Powell's analogy shows a good agreement with DNS, while the pressure fluctuations predicted by Lighthill's analogy are low compared with the DNS results after the vortex pairing.
• DOI: 10.1299/kikaib.66.646_1527
• オンライン閲覧公開範囲: インターネット公開
• 連携機関・データベース: 科学技術振興機構 : J-STAGE; http://www.jstage.jst.go.jp

• 要約等: Direct numerical simulations have been performed to clarify the sound generation mechanism in a two-dimensional temporally evolving compressible mixing layers. The sound generation in mixing layer is governed by the variations of vorticity which are induced by the Kelvin-Helmholtz instability. The pressure fluctuations with high frequency are observed in the period of vortex roll-up, and the amplitude of pressure fluctuations increase on the occasion of vortex pairing. The acoustic source term is governed by the Reynolds stress component and the viscous component is negligible. The effects of convective Mach number Mc on sound generation are also investigated. Both the pressure fluctuations and acoustic source term increase with the increase of convective Mach number. For Mc=0.6, shock wave called'eddy shocklet, is produced by the vortex pairing, which dominates the sound generation from the mixing layer at high Mc. The far-field sound computed by DNS is compared with the predictions based on the acoustic analogies derived by Powell and Lighthill. The prediction by Powell's analogy shows a good agreement with DNS, while the pressure fluctuations predicted by Lighthill's analogy are low compared with the DNS results after the vortex pairing.
• DOI: 10.1299/kikaib.66.646_1527; https://doi.org/10.1299/kikaib.66.646_1527; 10.1299/jsmeb.44.505; https://doi.org/10.1299/jsmeb.44.505
• オンライン閲覧公開範囲: インターネット公開
• 関連情報: Sound Generation in Compressible Mixing Layers; https://cir.nii.ac.jp/crid/2120307889563405952; https://cir.nii.ac.jp/crid/2120589364539862656
• 関連情報（URI）: http://id.ndl.go.jp/bib/5978490; https://ndlsearch.ndl.go.jp/books/R000000004-I5978490; http://www.jstage.jst.go.jp/article/kikaib1979/66/646/66_646_1527/_pdf; http://www.jstage.jst.go.jp/article/jsmeb/44/4/44_4_505/_pdf
• 参照: Sound generation in a mixing layer; https://cir.nii.ac.jp/crid/1360855571377719680; Contributions to the theory of aerodynamic sound, with application to excess jet noise and the theory of the flute; https://cir.nii.ac.jp/crid/1361137046095569920; Radiation boundary conditions for acoustic and elastic wave calculations; https://cir.nii.ac.jp/crid/1361418518780819072; The generation of sound by aerodynamic sources in an inhomogeneous steady flow; https://cir.nii.ac.jp/crid/1361418519067881344; Boundary conditions for direct simulations of compressible viscous flows; https://cir.nii.ac.jp/crid/1361699993635126528; The compressible turbulent shear layer: an experimental study; https://cir.nii.ac.jp/crid/1361981471440098688; On sound generated aerodynamically I. General theory; https://cir.nii.ac.jp/crid/1363107368874098688; Theory of Vortex Sound; https://cir.nii.ac.jp/crid/1363107369541249280; Why Do Vortices Generate Sound?; https://cir.nii.ac.jp/crid/1363951794245912704; Direct computation of the sound from a compressible co-rotating vortex pair; https://cir.nii.ac.jp/crid/1363951794332786688; The scattering of sound waves by a vortex: numerical simulations and analytical solutions; https://cir.nii.ac.jp/crid/1364233270352644096
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org; CiNii Articles; 学術機関リポジトリデータベース; https://irdb.nii.ac.jp
• 書誌ID（NDLBibID）: 5978490; http://id.ndl.go.jp/bib/5978490
• NII論文ID: 110003474278; 130004223916