Reducing the noise emanating from a twin jet nozzle using flexible filaments Topics in Flow Control. Guest editors J.P. Bonnet and L. Cattafesta

Nathaniel Lucas, Michael Doty, Lutz Taubert, Israel J Wygnanski

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A twin jet was tested in anechoic facilities at the University of Arizona and NASA Langley Research Center to determine the effectiveness of flexible filaments in jet noise reduction. Results were strongly dependent on filament diameter and material, the most effective of which was found to be Tex 800 Kevlar. In the best configurations, the filaments consistently eliminated screech tones and reduced overall sound pressure level by 3 dB or more. Additionally, broadband shock noise was diminished by more than 5 dB over certain audible frequency ranges. Larger-scale tests run at NASA showed comparable reductions in overall sound pressure level and broadband shock-associated noise.

Original languageEnglish (US)
Article number1504
JournalExperiments in Fluids
Volume54
Issue number4
DOIs
StatePublished - Apr 2013

Fingerprint

jet nozzles
Flow control
NASA
Nozzles
filaments
Acoustic waves
sound pressure
screech tones
Noise abatement
shock
Acoustic noise
Kevlar (trademark)
broadband
jet aircraft noise
noise reduction
frequency ranges
configurations

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes
  • Computational Mechanics
  • Mechanics of Materials

Cite this

Reducing the noise emanating from a twin jet nozzle using flexible filaments Topics in Flow Control. Guest editors J.P. Bonnet and L. Cattafesta. / Lucas, Nathaniel; Doty, Michael; Taubert, Lutz; Wygnanski, Israel J.

In: Experiments in Fluids, Vol. 54, No. 4, 1504, 04.2013.

Research output: Contribution to journalArticle

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