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GT2004-53524 Experimental investigation of spatial and temporal aspects of the liquid fuel placement in a swirl cup at elevated pressure

Becker, J, and Hassa, C, (2004) GT2004-53524 Experimental investigation of spatial and temporal aspects of the liquid fuel placement in a swirl cup at elevated pressure. In: Proceedings of ASME Turbo Expo 2004, Power for Land, Sea and Air, June 14-17, 2004, Vienna, Austria. ASME Turbo Expo, Wien, 14.-17. Juni 2004, Wien, Österreich. ISBN 0-7918-3739-4.

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Abstract

The kerosene spray generated by a pressure swirl fuel nozzle embedded in a swirling airflow in a swirl cup typical of aeroengine combustors was investigated at different levels of air pressure to assess the counter-acting effects of increasing air density and transfer of centrifugal momentum from airflow to spray. Hardware parameters investigated included air swirl angle and fuel nozzle flow number. Measurement techniques included spray visualization, Phase-Doppler Anemometry (PDA) for spray analysis and Laser-Doppler Anemometry (LDA) for investigation of the air flow field. Operating conditions for PDA measurements were 6, 12, and 18 bar at 700 K. Spray visualizations and LDA measurements were performed at scaled operating conditions. It was found that fuel placement is governed by the presence or absence of a recirculation zone inside the swirl cup and hence by the swirl angle of the airflow. Analysis of temporal aspects of the spray showed the existence of droplet clusters. Configurations characterized by strong swirl furthermore exhibited a preferred frequency of inter-particle times.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2004,
Title:GT2004-53524 Experimental investigation of spatial and temporal aspects of the liquid fuel placement in a swirl cup at elevated pressure
Authors:
AuthorsInstitution or Email of Authors
Becker, J, UNSPECIFIED
Hassa, C, UNSPECIFIED
Date:2004
Journal or Publication Title:Proceedings of ASME Turbo Expo 2004, Power for Land, Sea and Air, June 14-17, 2004, Vienna, Austria
Refereed publication:Yes
In ISI Web of Science:No
Editors:
EditorsEmail
American Society of Mechanical Engineers (ASME), UNSPECIFIED
ISBN:0-7918-3739-4
Status:Published
Keywords:Spray cone angle, swirl, two-phase flow, combustion, aeroengine
Event Title:ASME Turbo Expo, Wien, 14.-17. Juni 2004
Event Location:Wien, Österreich
Event Type:international Conference
Organizer:American Society of Mechanical Engineers, International Gas Turbine Institute
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L TT - Triebwerkstechnologien
DLR - Research theme (Project):L - Combustion Chamber Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:06 Jan 2010 13:31

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