Application of POD on time-resolved schlieren in supersonic multi-stream rectangular jets

M. G. Berry, A. S. Magstadt, Mark N Glauser

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In this paper, we present an experimental investigation of a supersonic rectangular nozzle with aft deck used for three-stream engines. The jet utilizes a single expansion ramp nozzle (SERN) configuration along with multiple streams, operating at a bulk flow Mj,1 = 1.6 and bypass stream Mj,3 = 1.0. This idealized representation consists of two canonical flows: a supersonic convergent-divergent (CD) jet and a sonic wall jet. Time-resolved schlieren experiments were performed up to 100 kHz. Proper orthogonal decomposition (POD), as suggested by Lumley for structure identification in turbulent flows, is applied to the schlieren images and the spatial eigenfunctions and time-dependent coefficients are related to the flow structures. This research seeks to lay a foundation for fundamental testing of multi-stream SERNs and the identification of the flow physics that dominate these modern military nozzles.

Original languageEnglish (US)
Article number020706
JournalPhysics of Fluids
Volume29
Issue number2
DOIs
StatePublished - Feb 1 2017
Externally publishedYes

Fingerprint

nozzles
decomposition
wall jets
bypasses
ramps
turbulent flow
engines
eigenvectors
physics
expansion
coefficients
configurations

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Application of POD on time-resolved schlieren in supersonic multi-stream rectangular jets. / Berry, M. G.; Magstadt, A. S.; Glauser, Mark N.

In: Physics of Fluids, Vol. 29, No. 2, 020706, 01.02.2017.

Research output: Contribution to journalArticle

@article{8576f7aabecf4ea49a43268ba85b6c9c,
title = "Application of POD on time-resolved schlieren in supersonic multi-stream rectangular jets",
abstract = "In this paper, we present an experimental investigation of a supersonic rectangular nozzle with aft deck used for three-stream engines. The jet utilizes a single expansion ramp nozzle (SERN) configuration along with multiple streams, operating at a bulk flow Mj,1 = 1.6 and bypass stream Mj,3 = 1.0. This idealized representation consists of two canonical flows: a supersonic convergent-divergent (CD) jet and a sonic wall jet. Time-resolved schlieren experiments were performed up to 100 kHz. Proper orthogonal decomposition (POD), as suggested by Lumley for structure identification in turbulent flows, is applied to the schlieren images and the spatial eigenfunctions and time-dependent coefficients are related to the flow structures. This research seeks to lay a foundation for fundamental testing of multi-stream SERNs and the identification of the flow physics that dominate these modern military nozzles.",
author = "Berry, {M. G.} and Magstadt, {A. S.} and Glauser, {Mark N}",
year = "2017",
month = "2",
day = "1",
doi = "10.1063/1.4974518",
language = "English (US)",
volume = "29",
journal = "Physics of Fluids",
issn = "1070-6631",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

TY - JOUR

T1 - Application of POD on time-resolved schlieren in supersonic multi-stream rectangular jets

AU - Berry, M. G.

AU - Magstadt, A. S.

AU - Glauser, Mark N

PY - 2017/2/1

Y1 - 2017/2/1

N2 - In this paper, we present an experimental investigation of a supersonic rectangular nozzle with aft deck used for three-stream engines. The jet utilizes a single expansion ramp nozzle (SERN) configuration along with multiple streams, operating at a bulk flow Mj,1 = 1.6 and bypass stream Mj,3 = 1.0. This idealized representation consists of two canonical flows: a supersonic convergent-divergent (CD) jet and a sonic wall jet. Time-resolved schlieren experiments were performed up to 100 kHz. Proper orthogonal decomposition (POD), as suggested by Lumley for structure identification in turbulent flows, is applied to the schlieren images and the spatial eigenfunctions and time-dependent coefficients are related to the flow structures. This research seeks to lay a foundation for fundamental testing of multi-stream SERNs and the identification of the flow physics that dominate these modern military nozzles.

AB - In this paper, we present an experimental investigation of a supersonic rectangular nozzle with aft deck used for three-stream engines. The jet utilizes a single expansion ramp nozzle (SERN) configuration along with multiple streams, operating at a bulk flow Mj,1 = 1.6 and bypass stream Mj,3 = 1.0. This idealized representation consists of two canonical flows: a supersonic convergent-divergent (CD) jet and a sonic wall jet. Time-resolved schlieren experiments were performed up to 100 kHz. Proper orthogonal decomposition (POD), as suggested by Lumley for structure identification in turbulent flows, is applied to the schlieren images and the spatial eigenfunctions and time-dependent coefficients are related to the flow structures. This research seeks to lay a foundation for fundamental testing of multi-stream SERNs and the identification of the flow physics that dominate these modern military nozzles.

UR - http://www.scopus.com/inward/record.url?scp=85013212275&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85013212275&partnerID=8YFLogxK

U2 - 10.1063/1.4974518

DO - 10.1063/1.4974518

M3 - Article

VL - 29

JO - Physics of Fluids

JF - Physics of Fluids

SN - 1070-6631

IS - 2

M1 - 020706

ER -