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Application of numerical spray simulation to accompany experiments in the LPP premise duct at DLR

Rachner, M. (1998) Application of numerical spray simulation to accompany experiments in the LPP premise duct at DLR. BRITE/EURAM Low NOxIII - Focused Generics- Meeting No. 5, München, 10.02.1998.

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Abstract

The presentation communicates some numerical results achieved during BRITE/EURAM Low-NOx III, which are based on experimental results obtained in Task 2.1.5 of Low-NOx II at the LPP premix duct at DLR. Experimental results are given here only for comparison purposes or where experimental and numerical results complement each other. The evaporation and mixing of kerosine emerging from a flat prefilming airbalst atomizer were studied in a straight rectangular duct at conditions relevant for lean premixed and prevaporized combustion. Computations werde based on the Lagrangian particle tracking technique using a standard single-component evaporation model for the multicomponent fuel Jet A-1, whose measured spray features obtained by Phase-Doppler-Anemometry were captured sufficiently well, with and without taking into account the spray feedback on the gas field. A degree of evaporation of ~95% was found after 100 mm for 9 bar air pressure, 750 K air temperature and 120 m/s air velocity. Parametric variations of pressure, air temperature and athe initial temperature of the spray were conducted. The latter turned out to have a strong influence on evaporation. The air pressure had mainly an indirect but strong effect through atomization quality. The strong increasse of evaporation with the air temperature is caused both by atomization and by the evaporation process itsself. It turned out that proper estimations or measurements of the initial spray conditions, especially the dropsize distribution and the spray initial temperature were important for the accuracy of the spray simulation. If proper spray initial conditions are provided, the chosen standard single component evaporation model gives sufficient agreement with the experiment and can be used as a design tool.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1999,
Title:Application of numerical spray simulation to accompany experiments in the LPP premise duct at DLR
Authors:
AuthorsInstitution or Email of Authors
Rachner, M.UNSPECIFIED
Date:1998
Status:Published
Keywords:Spray evaporation, numerical simulation, premix duct, high pressure, Kerosine, airblast atomizer, gas turbine combustion chamber
Event Title:BRITE/EURAM Low NOxIII - Focused Generics- Meeting No. 5, München, 10.02.1998
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 12:57

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