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 Wygnanski

doi:10.1007/s00348-013-1504-8

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 Wygnanski

Aerospace and Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

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 language	English (US)
Article number	1504
Journal	Experiments in Fluids
Volume	54
Issue number	4
DOIs	https://doi.org/10.1007/s00348-013-1504-8
State	Published - Apr 2013

ASJC Scopus subject areas

Computational Mechanics
Mechanics of Materials
General Physics and Astronomy
Fluid Flow and Transfer Processes

Access to Document

10.1007/s00348-013-1504-8

Cite this

@article{7459e88287c74f409cfdaa14e988139a,

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

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.",

author = "Nathaniel Lucas and Michael Doty and Lutz Taubert and Israel Wygnanski",

note = "Funding Information: We would like to acknowledge the assistance of Dr. Jesse Little, who was very helpful in making sure the results and background information were framed in the proper context with respect to other aeroacoustics research that has been done in the past, and Philipp Tewes, who contributed to the data processing effort. Many thanks to Harry Haskin, John Swartzbaugh, and the rest of the NASA JNL crew for the exciting opportunity to collaborate our research. Funding for the NASA tests from the NASA Langley Research Directorate Office and the Fundamental Aeronautics Program Supersonics Project is gratefully acknowledged.",

year = "2013",

month = apr,

doi = "10.1007/s00348-013-1504-8",

language = "English (US)",

volume = "54",

journal = "Experiments in Fluids",

issn = "0723-4864",

publisher = "Springer Verlag",

number = "4",

}

TY - JOUR

T1 - Reducing the noise emanating from a twin jet nozzle using flexible filaments Topics in Flow Control. Guest editors J.P. Bonnet and L. Cattafesta

AU - Lucas, Nathaniel

AU - Doty, Michael

AU - Taubert, Lutz

AU - Wygnanski, Israel

N1 - Funding Information: We would like to acknowledge the assistance of Dr. Jesse Little, who was very helpful in making sure the results and background information were framed in the proper context with respect to other aeroacoustics research that has been done in the past, and Philipp Tewes, who contributed to the data processing effort. Many thanks to Harry Haskin, John Swartzbaugh, and the rest of the NASA JNL crew for the exciting opportunity to collaborate our research. Funding for the NASA tests from the NASA Langley Research Directorate Office and the Fundamental Aeronautics Program Supersonics Project is gratefully acknowledged.

PY - 2013/4

Y1 - 2013/4

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84877824345&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877824345&partnerID=8YFLogxK

U2 - 10.1007/s00348-013-1504-8

DO - 10.1007/s00348-013-1504-8

M3 - Article

SN - 0723-4864

VL - 54

JO - Experiments in Fluids

JF - Experiments in Fluids

IS - 4

M1 - 1504

ER -

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

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this