Turbulent Noise Generated by a Jet Fan

• Kodama, Yoshio

• Hayashi, Hidechito

• Murayama, Masaru

• Kondou, Shigeki

• Yamaguchi, Hidenori

• Ishida, Seiki

抄録

There are two mechanisms giving rise to the dipole-type radiation of the turbulent noise generated from Jet fan. One is the strong turbulence induced by a front rotor which flows into the rear rotor, which, in tum, random force fluctuation on a rear rotor blade. Another is shedding of vortices from the trailing edge of the both front and rear rotors. In this paper, we take these two mechanisms into consideration to theoretically estimate the turbulent noise level. The estimated values agree well with the measured levels of turbulent noise generated by the Jet fan. It is theoretically clarified that the noise generated by the rear rotor is higher than that from the front rotor. The noise due to the turbulent flow is higher than that due to the vortex shedding from the trailing edge of the rotor.

長崎大学工学部研究報告 Vol.34(62) p. 9-17, 2004

収録刊行物

• 長崎大学工学部研究報告

  長崎大学工学部研究報告 34 (62), 9-17, 2004-01

  長崎 : 長崎大学工学部

キーワード

• Fluid Machine
• Fan
• Turbulent Noise
• Specific Noise Level
• Acoustic Power

詳細情報

• CRID: 1050287297262411008
• NII論文ID: 110006425166
• NII書誌ID: AN00178418
• ISSN: 02860902
• HANDLE: 10069/14934
• NDL書誌ID: 6947873
• Web Site: https://nagasaki-u.repo.nii.ac.jp/records/21050
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6947873
• 本文言語コード: en
• 資料種別: departmental bulletin paper
• データソース種別:
  • IRDB
  • NDL
  • CiNii Articles