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Simultaneous velocity and concentration field measurements of pulsating and heated coaxial turbulent jets in square turbulent duct flow

Klinner, Joachim and Willert, Christian and Förster, Wolfgang and Beversdorff, Manfred and Mayer, Valentin (2015) Simultaneous velocity and concentration field measurements of pulsating and heated coaxial turbulent jets in square turbulent duct flow. 11th Intern. Symp. on Particle Image Velocimetry PIV'15, 14.-16. Sep. 2015, Santa Barbara (CA), USA.

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Official URL: http://www.piv2015.org/

Abstract

Simultaneous velocity and concentration measurements of the mixing of a confined coaxial jet in air are performed in a small scale windtunnel at atmospheric pressure, constant mass flow rates and three modes of operation: isothermal steady jet injection (Re_d = 32000); pulsed isothermal injection (St=0.08) and steady injection at elevated jet temperatures of deltaT=50K and deltaT=100 K. Instantaneous measurements of mass fraction are implemented using planar laser induced fluorescence (PLIF) of the acetone seeded injected flow. Simultaneous two-component velocity measurements are performed using particle image velocimetry (PIV). The contribution provides details of the PLIF-PIV measurement setup, data evaluation and accuracy estimation. Stochastic error convergence over the number of samples is assessed within the turbulent shear layer for first and second moments of velocity and mass fraction. Results from all modes of operation are discussed on the basis of velocity, mass fraction, Reynolds shear stress and turbulent mass flux.

Item URL in elib:https://elib.dlr.de/98305/
Document Type:Conference or Workshop Item (Speech)
Title:Simultaneous velocity and concentration field measurements of pulsating and heated coaxial turbulent jets in square turbulent duct flow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klinner, Joachimjoachim.klinner (at) dlr.deUNSPECIFIED
Willert, Christianchris.willert (at) dlr.deUNSPECIFIED
Förster, Wolfgangwolfgang.foerster (at) dlr.deUNSPECIFIED
Beversdorff, Manfredmanfred.beversdorff (at) dlr.deUNSPECIFIED
Mayer, ValentinDaimler AGUNSPECIFIED
Date:September 2015
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:particle image velocimetry, laser induced fluorescence, mixing fraction, flow visualization, turbulent mass flux, confined jet flow
Event Title:11th Intern. Symp. on Particle Image Velocimetry PIV'15
Event Location:Santa Barbara (CA), USA
Event Type:international Conference
Event Dates:14.-16. Sep. 2015
Organizer:University of California at Santa Barbara
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation methods
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Willert, Dr.phil. Christian
Deposited On:30 Sep 2015 13:45
Last Modified:31 Jul 2019 19:55

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