Noise reduction in supersonic jets exhausting over a simulated aircraft carrier deck

Russell W. Powers, Dennis K. McLaughlin, Philip John Morris

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An innovative noise reduction method for supersonic exhaust jets was studied in a model-scale aircraft carrier environment. Acoustic measurements of model exhaust jets with (and without) distributed blowing, producing “fluidic inserts,” were performed. The model carrier environment consisted of a ground plane of adjustable distance below the jet, and a simulated jet blast deflector similar to those found in practice. The noise reduction of fluidic insert jets, above a ground plane, with steering of the “quiet planes” was examined with heat-simulated jets using near- and far-field pressure measurements. For jets exhausting over a ground plane, the fluidic inserts reduced the overall sound pressure level by 3–5 dB in the direction of maximum noise radiation. Upstream and sideline angles showed very little or no increase in sound level. Jets impinging on a modeled jet blast deflector were tested in addition to jets solely in the presence of a ground plane. The deflector resulted in downstream acoustic shielding and an increase in low-frequency noise. The region of maximum noise radiation for heat-simulated jets from nozzles with fluidic inserts impinging on the jet blast deflector was reduced in level by 4–7 dB. This region includes areas where carrier personnel are located.

Original languageEnglish (US)
Pages (from-to)310-324
Number of pages15
JournalJournal of Aircraft
Volume55
Issue number1
DOIs
StatePublished - Jan 1 2018

Fingerprint

Aircraft carriers
Noise abatement
Fluidics
Acoustics
Acoustic waves
Radiation
Pressure measurement
Blow molding
Acoustic noise
Shielding
Nozzles

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Cite this

Powers, Russell W. ; McLaughlin, Dennis K. ; Morris, Philip John. / Noise reduction in supersonic jets exhausting over a simulated aircraft carrier deck. In: Journal of Aircraft. 2018 ; Vol. 55, No. 1. pp. 310-324.
@article{202ae8ddeb6747a4bf047998f71c0209,
title = "Noise reduction in supersonic jets exhausting over a simulated aircraft carrier deck",
abstract = "An innovative noise reduction method for supersonic exhaust jets was studied in a model-scale aircraft carrier environment. Acoustic measurements of model exhaust jets with (and without) distributed blowing, producing “fluidic inserts,” were performed. The model carrier environment consisted of a ground plane of adjustable distance below the jet, and a simulated jet blast deflector similar to those found in practice. The noise reduction of fluidic insert jets, above a ground plane, with steering of the “quiet planes” was examined with heat-simulated jets using near- and far-field pressure measurements. For jets exhausting over a ground plane, the fluidic inserts reduced the overall sound pressure level by 3–5 dB in the direction of maximum noise radiation. Upstream and sideline angles showed very little or no increase in sound level. Jets impinging on a modeled jet blast deflector were tested in addition to jets solely in the presence of a ground plane. The deflector resulted in downstream acoustic shielding and an increase in low-frequency noise. The region of maximum noise radiation for heat-simulated jets from nozzles with fluidic inserts impinging on the jet blast deflector was reduced in level by 4–7 dB. This region includes areas where carrier personnel are located.",
author = "Powers, {Russell W.} and McLaughlin, {Dennis K.} and Morris, {Philip John}",
year = "2018",
month = "1",
day = "1",
doi = "10.2514/1.C034213",
language = "English (US)",
volume = "55",
pages = "310--324",
journal = "Journal of Aircraft",
issn = "0021-8669",
publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",
number = "1",

}

Noise reduction in supersonic jets exhausting over a simulated aircraft carrier deck. / Powers, Russell W.; McLaughlin, Dennis K.; Morris, Philip John.

In: Journal of Aircraft, Vol. 55, No. 1, 01.01.2018, p. 310-324.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Noise reduction in supersonic jets exhausting over a simulated aircraft carrier deck

AU - Powers, Russell W.

AU - McLaughlin, Dennis K.

AU - Morris, Philip John

PY - 2018/1/1

Y1 - 2018/1/1

N2 - An innovative noise reduction method for supersonic exhaust jets was studied in a model-scale aircraft carrier environment. Acoustic measurements of model exhaust jets with (and without) distributed blowing, producing “fluidic inserts,” were performed. The model carrier environment consisted of a ground plane of adjustable distance below the jet, and a simulated jet blast deflector similar to those found in practice. The noise reduction of fluidic insert jets, above a ground plane, with steering of the “quiet planes” was examined with heat-simulated jets using near- and far-field pressure measurements. For jets exhausting over a ground plane, the fluidic inserts reduced the overall sound pressure level by 3–5 dB in the direction of maximum noise radiation. Upstream and sideline angles showed very little or no increase in sound level. Jets impinging on a modeled jet blast deflector were tested in addition to jets solely in the presence of a ground plane. The deflector resulted in downstream acoustic shielding and an increase in low-frequency noise. The region of maximum noise radiation for heat-simulated jets from nozzles with fluidic inserts impinging on the jet blast deflector was reduced in level by 4–7 dB. This region includes areas where carrier personnel are located.

AB - An innovative noise reduction method for supersonic exhaust jets was studied in a model-scale aircraft carrier environment. Acoustic measurements of model exhaust jets with (and without) distributed blowing, producing “fluidic inserts,” were performed. The model carrier environment consisted of a ground plane of adjustable distance below the jet, and a simulated jet blast deflector similar to those found in practice. The noise reduction of fluidic insert jets, above a ground plane, with steering of the “quiet planes” was examined with heat-simulated jets using near- and far-field pressure measurements. For jets exhausting over a ground plane, the fluidic inserts reduced the overall sound pressure level by 3–5 dB in the direction of maximum noise radiation. Upstream and sideline angles showed very little or no increase in sound level. Jets impinging on a modeled jet blast deflector were tested in addition to jets solely in the presence of a ground plane. The deflector resulted in downstream acoustic shielding and an increase in low-frequency noise. The region of maximum noise radiation for heat-simulated jets from nozzles with fluidic inserts impinging on the jet blast deflector was reduced in level by 4–7 dB. This region includes areas where carrier personnel are located.

UR - http://www.scopus.com/inward/record.url?scp=85041677542&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041677542&partnerID=8YFLogxK

U2 - 10.2514/1.C034213

DO - 10.2514/1.C034213

M3 - Article

VL - 55

SP - 310

EP - 324

JO - Journal of Aircraft

JF - Journal of Aircraft

SN - 0021-8669

IS - 1

ER -