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Surface Wave Propagation and Breakup in Planar Liquid Sheets of Prefilming Airblast Atomisers

Bhayaraju, Umesh and Hassa, Christoph (2006) Surface Wave Propagation and Breakup in Planar Liquid Sheets of Prefilming Airblast Atomisers. In: Proceedings of the International Conference on Liquid Atomization and Spray Systems, 10, 73-1-73-8. Academic Publication and Printings Co. Ltd., Osaka, Japan. International Conference on Liquid Atomization and Spray Systems, 2006-8-27 - 2006-9-1, Kyoto, Japan. ISBN 4-9902774-1-4C0053.

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Abstract

The liquid sheet breakup mechanism on a prefilming surface plays an important role in understanding the fuel placement in aeroengine combustors. Detailed knowledge of near-field and far-field characteristics of the spray is necessary for validation of spray combustion models incorporating airblast atomisers. An experimental approach is adopted in the present study to investigate the liquid sheet breakup mechanism on a prefilming surface and the characterisation of the spray. The liquid sheet breakup mechanism is studied by High-Speed Flow visualisation. Characterisation of the spray is carried out by PDA measurements. An effort is made to measure the near-field velocities of large structures with Particle Image Velocimetry. The sheet thickness on the prefilming surface is measured. The visualisation studies show that the liquid sheet breakup on the prefilming surface is different from the liquid sheet breakup without prefilmer surface. The PDA Measurements show that the relationship between Weber number and global SMD follows a power law. Application of PIV shows some promise in the acquisition of velocity data in the atomiser near-field.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Surface Wave Propagation and Breakup in Planar Liquid Sheets of Prefilming Airblast Atomisers
Authors:
AuthorsInstitution or Email of Authors
Bhayaraju, UmeshUNSPECIFIED
Hassa, ChristophUNSPECIFIED
Date:27 August 2006
Journal or Publication Title:Proceedings of the International Conference on Liquid Atomization and Spray Systems
Refereed publication:Yes
In ISI Web of Science:No
Volume:10
Page Range:73-1-73-8
Editors:
EditorsEmail
Institute of Liquid Atomization and Sprays Japan, UNSPECIFIED
Publisher:Academic Publication and Printings Co. Ltd., Osaka, Japan
Series Name:Proceedings of the International Conference on Liquid Atomization and Sprays
ISBN:4-9902774-1-4C0053
Status:Published
Keywords:Prefilmer Plate, Liquid Film, Surface Waves, Wave Plunging, Surface stripping, PIV, PDA
Event Title:International Conference on Liquid Atomization and Spray Systems
Event Location:Kyoto, Japan
Event Type:international Conference
Event Dates:2006-8-27 - 2006-9-1
Organizer:Institute of Liquid Atomization and Sprays Japan
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Combustion Chamber Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Combustor
Deposited By: Dr.-Ing. Christoph Hassa
Deposited On:18 Sep 2006
Last Modified:27 Apr 2009 13:04

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