Influence of non-axisymmetric perturbations on the hole-tone feedback cycle: A numerical study

Mikael A. Langthjem, Masami Nakano

研究成果: Conference contribution

抄録

The paper is concerned with the hole-tone feedback cycle problem, also known as Rayleigh's bird-call. A methodology for analyzing the influence of non-axisymmetric perturbations of the jet on the sound generation is described. These perturbations are applied at the jet nozzle via piezoelectric or electro-mechanical actuators, placed circumferentially inside the nozzle at its exit. The mathematical model is based on the discrete vortex method, using vortex fllament rings. The nozzle and the holed end-plate are represented by bound (fixed) axisymmetric vortex rings. The shear layer of the jet and the actuator-equipped downstream section of the nozzle are represented by three-dimensional vortex fllaments. The sound generation is described mathematically using the Powell-Howe theory of vortex sound. The ultimate aim of the work is to control the flow and the accompanying sound generation.

本文言語English
ホスト出版物のタイトルInstitute of Noise Control Engineering of the USA - 35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006
ページ1505-1513
ページ数9
出版ステータスPublished - 2006 12月 1
外部発表はい
イベント35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006 - Honolulu, HI, United States
継続期間: 2006 12月 32006 12月 6

出版物シリーズ

名前Institute of Noise Control Engineering of the USA - 35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006
3

Other

Other35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006
国/地域United States
CityHonolulu, HI
Period06/12/306/12/6

ASJC Scopus subject areas

  • 音響学および超音波学

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