Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/35870
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

Linear Stability Analysis of a Viscous Liquid Sheet in Coflow with a Viscous Gas

AuthorsHauke, G.; Dopazo, C.; Lozano Fantoba, Antonio; Barreras Toledo, Félix; Hernández, A.
KeywordsGas-liquid interphases
Instabilities
Linear instability analysis
Issue Date2001
PublisherSpringer
CitationFlow Turbulence and Combustion 67(3) : 235-265 (2001)
AbstractAir-assisted atomizers in which a thin liquid sheet is deformed under the action of a high-speed air flow are extensively used in industrial applications, e.g., in aircraft turbojet injectors. Primary atomization in these devices is a consequence of the onset and growth of instabilities on the air/liquid interfaces. To better understand this process, a temporal linear instability analysis is applied to a thin planar liquid sheet flowing between two semi-infinite streams of a high-speed viscous gas. This study includes the full viscous effects both in the liquid and gas basic states and perturbations. The relevant dimensionless groups entering the non-dimensional Orr–Sommerfeld equations and boundary conditions are the liquid and gas stream Reynolds numbers, the gas to liquid momentum flux ratio, the gas/liquid velocity ratio, the Weber number and the equivalent gas boundary layer to liquid sheet thickness ratio. Growth rates and temporal frequencies as a function of the wavenumber, varying the different dimensionless parameters are presented, together with neutral stability curves. From the results of this parametric study it is concluded that when the physical properties of gas and liquid are fixed, the momentum flux ratio is especially relevant to determine the instability conditions. It is also observed that the gas boundary layer thickness strongly influences the wave propagation, and acts by damping sheet oscillation frequency and growth. This is especially important because viscosity in the basic gas velocity profile has always been ignored in instability analysis applied to the geometry under study.
Publisher version (URL)http://dx.doi.org/10.1023/A:1015054524365
URIhttp://hdl.handle.net/10261/35870
DOI10.1023/A:1015054524365
ISSN1386-6184
Appears in Collections:(LIFTEC) Artículos

Show full item record
Review this work

SCOPUSTM   
Citations

17
checked on May 8, 2022

WEB OF SCIENCETM
Citations

18
checked on May 12, 2022

Page view(s)

284
checked on May 15, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.