A simple approach for evaluation of cut-on condition of higher order modes in inhomogeneous uniform acoustic waveguides

Dokumaci E.

JOURNAL OF SOUND AND VIBRATION, cilt.440, ss.231-238, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 440
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.jsv.2018.10.032
  • Dergi Adı: JOURNAL OF SOUND AND VIBRATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.231-238
  • Anahtar Kelimeler: Waveguides, Temperature gradient, Cut-on conditions, Oscillatory differential equations, LINEAR TEMPERATURE-GRADIENT, HOT GAS-FLOWS, MEAN FLOW, TRANSMISSION, PROPAGATION, FIELDS, SOUND, DUCTS, PIPE
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Uniform acoustic waveguides in initially quiescent inhomogeneous media are governed by Bergmann's wave equation. The transverse modes are independent of the ambient gradient, but there is a void of papers on the cut-on conditions of the higher order axial modes. This paper presents a sufficient cut-on condition and discusses its application to hard-walled ducts in which the mean temperature varies linearly and exponentially along the duct axis. (C) 2018 Elsevier Ltd. All rights reserved.