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Material acceleration determination for high speed flows by means of ShakeTheBox multipulse particle tracking

Novara, Matteo and Schanz, Daniel and Gesemann, Sebastian and Schröder, Andreas (2016) Material acceleration determination for high speed flows by means of ShakeTheBox multipulse particle tracking. International Workshop on NonIntrusive Optive Flow Diagnostics, 25.-26. Okt. 2016, Delft, Niederlande.

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Official URL: http://www.lr.tudelft.nl/en


The recent introduction of the ShakeTheBox 3D particle tracking technique (Schanz et al 2016) opened the possibility to perform accurate Lagrangian particle tracking at seeding densities typical and exceeding those applied for tomographic PIV experiments (TomoPIV, Elsinga et al 2006). The method makes use of the particle based Iterative Particle Reconstruction technique (IPR, Wieneke 2013) to initialize particle tracks over a few recordings (typically four). Subsequently, the concept of particle prediction is introduced, where the position of tracked particles at following time instants is extrapolated from the initialized tracks; the predicted particle location is then corrected by means of the IPR image matching technique, referred to as shaking. As a consequence, the full IPR reconstruction is needed only during the initialization phase, which largely reduces the computational costs of the processing technique. The particle locations along the trajectories can be fitted in order to reduce the random particle position error introduced during reconstruction and to analytically evaluate velocity and material acceleration. The measurement of the material acceleration is of particular interest for many industrial and engineering applications as it can be used to determine the instantaneous pressure field via the momentum equation (van Oudheusden 2013, Huhn et al 2015). Due to current hardware limitations in terms of maximum acquisition frequency, timeresolved sequences suitable for STB processing can be obtained only for relatively low flow speeds (typically lower than 10

Item URL in elib:https://elib.dlr.de/106081/
Document Type:Conference or Workshop Item (Speech)
Title:Material acceleration determination for high speed flows by means of ShakeTheBox multipulse particle tracking
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Novara, Matteomatteo.novara (at) dlr.deUNSPECIFIED
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Gesemann, Sebastiansebastian.gesemann (at) dlr.deUNSPECIFIED
Schröder, AndreasAndreas.Schroeder (at) dlr.deUNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:high speed flow, ShakeTheBox, Lagrangian particle tracking
Event Title:International Workshop on NonIntrusive Optive Flow Diagnostics
Event Location:Delft, Niederlande
Event Type:Workshop
Event Dates:25.-26. Okt. 2016
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 of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Bachmann, Barbara
Deposited On:17 Nov 2016 14:30
Last Modified:17 Nov 2016 14:30

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