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Estimation of Time-Resolved 3D Pressure Fields in an Impinging Jet Flow from Dense Lagrangian Particle Tracking

Huhn, Florian and Schröder, Andreas and Schanz, Daniel and Gesemann, Sebastian and Manovski, Peter (2018) Estimation of Time-Resolved 3D Pressure Fields in an Impinging Jet Flow from Dense Lagrangian Particle Tracking. In: 18th International Symposium on Flow Visualization 2018 (214m), pp. 1-11. 18th International Symposium on Flow Visualization 2018, 26. - 29. June 2018, Zurich, Switzerland.

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Official URL: http://www.isfv18.ethz.ch/

Abstract

Lagrangian particle tracking (LPT) using the Shake-The-Box (STB) method enables a dense and accurate 3D measurement of position, velocity and acceleration vectors of a large amount of single seeding tracers imaged by a multiple camera system. A subsequent application of the data assimilation technique “FlowFit” to the reconstructed particle tracks provides access to the full time resolved velocity gradient tensor together with the 3D pressure (gradient) fields. A perpendicular impinging jet flow with exit velocities at U = 1, 4 and 16 m/s and nozzle to plate spacing of H/D = 5 has been investigated using largevolume STB. Helium-filled soap bubbles are used as tracer particles which are illuminated with pulsed LED arrays. A large measurement volume has been covered (cloud of tracked particles in a volume of 54 liters, ∼ 190,000 particles). The reconstructed time-resolved 3D pressure fields have been validated against microphone recordings at the wall with high correlation coefficients up to R = 0.88. In this paper the experimental conditions are described together with the main processing parameters adopted for the STB strategy and the applied FlowFit data assimilation method. Results are shown in terms of instantaneous flow and pressure fields together with comparisons to time-traces of synchronously measured microphone signals.

Item URL in elib:https://elib.dlr.de/119993/
Document Type:Conference or Workshop Item (Speech)
Additional Information:1.2.3 im Book of Abstract
Title:Estimation of Time-Resolved 3D Pressure Fields in an Impinging Jet Flow from Dense Lagrangian Particle Tracking
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Huhn, FlorianAS-EXVUNSPECIFIED
Schröder, Andreasandreas.schroeder (at) dlr.dehttps://orcid.org/0000-0002-6971-9262
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Gesemann, Sebastiansebastian.gesemann (at) dlr.deUNSPECIFIED
Manovski, PeterDSTG, AustraliaUNSPECIFIED
Date:June 2018
Journal or Publication Title:18th International Symposium on Flow Visualization 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-11
Series Name:Conference Proceedings online, Book of Abstracts
Status:Published
Keywords:Unsteady 3D pressure, dense accelerometry, data assimilation, flow visualization, turbulent impinging jet flow
Event Title:18th International Symposium on Flow Visualization 2018
Event Location:Zurich, Switzerland
Event Type:international Conference
Event Dates:26. - 29. June 2018
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Micknaus, Ilka
Deposited On:04 Dec 2018 16:08
Last Modified:25 Sep 2019 12:00

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