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Liquid fuel placement and mixing of a generic aeroengine premix module at different operating conditions, paper number GT-2002-30102

Becker, J. and Hassa, C. (2002) Liquid fuel placement and mixing of a generic aeroengine premix module at different operating conditions, paper number GT-2002-30102. In: 2002 ASME Turbo Expo, June 3-6, 2002, Amsterdam, The Netherlands. ASME Turbo Expo 2002, Amsterdam, 3.-6. Juni 2002.

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Abstract

Fuel placement and air-fuel mixing in a generic aeroengine premix module employing plain jet liquid fuel injection into a counter-swirling double-annular crossflow were investigated at different values of air inlet pressure (6 bar, 700 K and 12 bar, 700 K) and liquid-to-air momentum flux ratio, both parameters being a function of engine power. Kerosene Jet A-1 was used as liquid fuel. Measurement techniques included LDA for investigation of the airflow and Mie-scattering laser light sheets and PDA for investigation of the two-phase flow. Measurements were taken at various axial distances from the fuel nozzle equivalent to mean residence times of up to 0.47 ms. It was found that the initial fuel placement reacts very sensitively to a variation of liquid-to-air momentum flux ratio. Susceptibility of the spray to dispersion due to centrifugal forces and to turbulent mixing is primarily a function of the fuel droplet diameters, which in turn depend on operating pressure. The data are interpreted by evaluation of the corresponding Stokes numbers.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2003,
Title:Liquid fuel placement and mixing of a generic aeroengine premix module at different operating conditions, paper number GT-2002-30102
Authors:
AuthorsInstitution or Email of Authors
Becker, J.UNSPECIFIED
Hassa, C.UNSPECIFIED
Date:2002
Journal or Publication Title:2002 ASME Turbo Expo, June 3-6, 2002, Amsterdam, The Netherlands
Editors:
EditorsEmail
The American Society of Mechanical Engineers, UNSPECIFIED
Status:Published
Keywords:LPP, mixing, two-phase flow, spray dispersion, Stokes number
Event Title:ASME Turbo Expo 2002, Amsterdam, 3.-6. Juni 2002
Organizer:The American Society of Mechanical Engineers
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 13:24

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