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Spray Dispersion in a Counter-Swirling Double Annular Airflow at Gas Turbine Conditions

Becker, J. and Heitz, D. and Hassa, C. (2001) Spray Dispersion in a Counter-Swirling Double Annular Airflow at Gas Turbine Conditions. 17th Annual Conference on Liquid Atomization and Spray Systems, ILASS-Europe 2001, Zürich, 2.-6. Sept. 2001.

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Abstract

The dispersion of a Jet A-1 kerosene spray generated by plain-jet-in-crossflow injection into the inner annulus of a counter-swirling double-annular airflow was investigated experimentally. Tests were conducted at 6 bar and 12 bar ambient air pressure at 750 K air temperature and at the corresponding cold test conditions in terms of air density, with an additional excursion to very high air density (9.3 bar at 290 K). The total air velocity was 114 m/s and the fuel flow through the 0.457 mm diameter plain jet nozzle was selected so that the fuel-to-air momentum flux ratio q (=(rliq×uliq2)/(rair×uair2)) was q = 4.6 . The airflow was characterized by Laser-Doppler-Anemometry (LDA) and the spray dispersion was investigated by Phase-Doppler-Anemometry (PDA). It was found that the very small droplets generated at high pressure have such a great ability to follow the streamlines of the airflow that they remain trapped in the inner annulus, preventing the formation of a homogenous fuel-air mixture in the annular flow.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Spray Dispersion in a Counter-Swirling Double Annular Airflow at Gas Turbine Conditions
Authors:
AuthorsInstitution or Email of Authors
Becker, J.UNSPECIFIED
Heitz, D.UNSPECIFIED
Hassa, C.UNSPECIFIED
Date:2001
Page Range:pp. 1-6
Status:Published
Keywords:Gasturbine, Sprays, Dispersion
Event Title:17th Annual Conference on Liquid Atomization and Spray Systems, ILASS-Europe 2001, Zürich, 2.-6. Sept. 2001
Organizer:ILASS
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 13:17

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