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Experimental statistics of droplet trajectory and air flow during aerodynamic fragmentation of liquid drops

Flock, Andreas K. and Guildenbecher, Daniel R. and Chen, Jun and Sojka, Paul E. and Bauer, Hans-Jörg (2012) Experimental statistics of droplet trajectory and air flow during aerodynamic fragmentation of liquid drops. International Journal of Multiphase Flow, 47, pp. 37-49. Elsevier. DOI: 10.1016/j.ijmultiphaseflow.2012.06.008 ISSN 0301-9322

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Abstract

The deformation and fragmentation of single ethyl alcohol drops injected into a continuous air-jet is experimentally investigated. High speed shadowgraphy coupled with image contour recognition is used to record the instantaneous droplet shape, trajectory, velocity and acceleration, while particle Image velocimetry captures the gas-phase flow-field around the drop. All experiments are repeated hundreds of times in order to determine the statistics based mean flow behavior. Two conditions are considered— one which leads to the bag breakup morphology and one leading to the sheet-thinning morphology. Comparing the two cases, no significant differences are observed in the structure of the gas-Phase wake, indicating that gas-phase flow morphologies may not significantly affect the transition between liquid-phase breakup morphologies. The results of this investigation will be useful for the development and validation of simulation techniques.

Item URL in elib:https://elib.dlr.de/113595/
Document Type:Article
Title:Experimental statistics of droplet trajectory and air flow during aerodynamic fragmentation of liquid drops
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Flock, Andreas K.andreas.flock (at) dlr.deUNSPECIFIED
Guildenbecher, Daniel R.UNSPECIFIEDUNSPECIFIED
Chen, JunUNSPECIFIEDUNSPECIFIED
Sojka, Paul E.UNSPECIFIEDUNSPECIFIED
Bauer, Hans-Jörgkit, institut für thermische strömungsmaschinenUNSPECIFIED
Date:2012
Journal or Publication Title:International Journal of Multiphase Flow
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:47
DOI :10.1016/j.ijmultiphaseflow.2012.06.008
Page Range:pp. 37-49
Publisher:Elsevier
ISSN:0301-9322
Status:Published
Keywords:Secondary Breakup, Atomization, Sprays, PIV, Shadowgraph
HGF - Research field:Energy
HGF - Program:other
HGF - Program Themes:E - no assignment
DLR - Research area:Energy
DLR - Program:E - no assignment
DLR - Research theme (Project):E - no assignment
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonoc and Hypersonic Technology
Deposited By: Flock, Andreas
Deposited On:23 Aug 2017 09:55
Last Modified:06 Sep 2019 15:16

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