PIV analysis of coupled supersonic twin-jets

Graham William Bell; J. Soria; D. Honnery; Daniel Edgington-Mitchell

PIV analysis of coupled supersonic twin-jets

Mechanical & Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

Abstract

An analysis of the standing-wave present in twin supersonic jets examined and linked to coupling mode. High resolution particle image velocimetry measurements are made for two nozzle pressure ratios, which are selected due to a change in coupling family indicated by a discontinuous jump in screech frequency.A strong nearfield standing-wave is observed for the higher nozzle pressure ratio case where a mismatch between the acoustic screech wavelength and standing-wavelength is observed. Avery weak standing-wave is observed in the lower pressure case, which more closely matches the screech wavelength. Two-point velocity correlations reveal a symmetric mode coupling for the higher pressure case. The lower pressure case provided little evidence for plume coupling belonging to an in-plane family oscillation.

Original language	English
Title of host publication	Proceedings of the 20th Australasian Fluid Mechanics Conference (AFMC)
Publisher	Australasian Fluid Mechanics Society
Number of pages	4
ISBN (Electronic)	9781740523776
Publication status	Published - 2016
Event	Australasian Fluid Mechanics Conference 2016 - The University of Western Australia, Perth, Australia Duration: 5 Dec 2016 → 8 Dec 2016 Conference number: 20th

Conference

Conference	Australasian Fluid Mechanics Conference 2016
Abbreviated title	AFMC 2016
Country/Territory	Australia
City	Perth
Period	5/12/16 → 8/12/16

Cite this

@inproceedings{6803118d3e6f49788e8bdb1c1734867e,

title = "PIV analysis of coupled supersonic twin-jets",

abstract = "An analysis of the standing-wave present in twin supersonic jets examined and linked to coupling mode. High resolution particle image velocimetry measurements are made for two nozzle pressure ratios, which are selected due to a change in coupling family indicated by a discontinuous jump in screech frequency.A strong nearfield standing-wave is observed for the higher nozzle pressure ratio case where a mismatch between the acoustic screech wavelength and standing-wavelength is observed. Avery weak standing-wave is observed in the lower pressure case, which more closely matches the screech wavelength. Two-point velocity correlations reveal a symmetric mode coupling for the higher pressure case. The lower pressure case provided little evidence for plume coupling belonging to an in-plane family oscillation.",

author = "Bell, \{Graham William\} and J. Soria and D. Honnery and Daniel Edgington-Mitchell",

year = "2016",

language = "English",

booktitle = "Proceedings of the 20th Australasian Fluid Mechanics Conference (AFMC)",

publisher = "Australasian Fluid Mechanics Society",

address = "Australia",

note = "Australasian Fluid Mechanics Conference 2016, AFMC 2016 ; Conference date: 05-12-2016 Through 08-12-2016",

}

TY - GEN

T1 - PIV analysis of coupled supersonic twin-jets

AU - Bell, Graham William

AU - Soria, J.

AU - Honnery, D.

AU - Edgington-Mitchell, Daniel

N1 - Conference code: 20th

PY - 2016

Y1 - 2016

N2 - An analysis of the standing-wave present in twin supersonic jets examined and linked to coupling mode. High resolution particle image velocimetry measurements are made for two nozzle pressure ratios, which are selected due to a change in coupling family indicated by a discontinuous jump in screech frequency.A strong nearfield standing-wave is observed for the higher nozzle pressure ratio case where a mismatch between the acoustic screech wavelength and standing-wavelength is observed. Avery weak standing-wave is observed in the lower pressure case, which more closely matches the screech wavelength. Two-point velocity correlations reveal a symmetric mode coupling for the higher pressure case. The lower pressure case provided little evidence for plume coupling belonging to an in-plane family oscillation.

AB - An analysis of the standing-wave present in twin supersonic jets examined and linked to coupling mode. High resolution particle image velocimetry measurements are made for two nozzle pressure ratios, which are selected due to a change in coupling family indicated by a discontinuous jump in screech frequency.A strong nearfield standing-wave is observed for the higher nozzle pressure ratio case where a mismatch between the acoustic screech wavelength and standing-wavelength is observed. Avery weak standing-wave is observed in the lower pressure case, which more closely matches the screech wavelength. Two-point velocity correlations reveal a symmetric mode coupling for the higher pressure case. The lower pressure case provided little evidence for plume coupling belonging to an in-plane family oscillation.

UR - https://www.scopus.com/pages/publications/85084016103

M3 - Conference Paper

AN - SCOPUS:85084016103

BT - Proceedings of the 20th Australasian Fluid Mechanics Conference (AFMC)

PB - Australasian Fluid Mechanics Society

T2 - Australasian Fluid Mechanics Conference 2016

Y2 - 5 December 2016 through 8 December 2016

ER -

PIV analysis of coupled supersonic twin-jets

Abstract

Conference

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