elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Simultaneous absorption and PLIF measurements of OH and kerosene for reliable single-pulse temperature and fuel measurements in lean jet engine combustors

Heinze, Johannes and Behrendt, Thomas and Meier, Ulrich and Schodl, Richard (2005) Simultaneous absorption and PLIF measurements of OH and kerosene for reliable single-pulse temperature and fuel measurements in lean jet engine combustors. 13th Gordon Research Conference on Laser Diagnostics for Combustion, 2005-07-31 - 2005-08-05, Mount Holyoke College, MA (USA). (Unpublished)

Full text not available from this repository.

Official URL: http://www.physics.ox.ac.uk/grc2005/

Abstract

The development of modern low pollution jet engines requires data on fuel and temperature distributions under varying operation conditions. In addition, lean premixed combustion is potentially prone to combustion instabilities, therefore time resolved measurement techniques are highly desirable. By combining planar laser induced fluorescence (PLIF) and absorption measurement techniques, a new sensitive planar laser measurement technique, which is reliable and efficient under realistic test conditions will be presented for time resolved determination of flame temperature and fuel distribution in lean pressurized combustion systems. PLIF of the OH radical as temperature indicator and kerosene PLIF to determine fuel distribution is used to characterise the flame. In technical combustion systems the PLIF measurement leads generally to the problem of laser absorption and of the interference of OH and kerosene LIF. The simultaneous detection of the PLIF signal by two cameras using different spectral filters reduces the interference difficulties substantially. A simultaneous measurement of laser absorption and OH LIF leads to an absorption correction and to the absolute calibration of the OH image. The temperature can be deduced from the OH equilibrium concentration, which grows exponentially with temperature, in lean flames (phi<0.9) nearly independently of phi. The high temperature sensitivity of this method, which is about 8 times higher than the sensitivity of the usually used OH 2-line thermometry, enables the reliable statistical evaluation of the single-pulse temperature images.

Document Type:Conference or Workshop Item (Poster)
Title:Simultaneous absorption and PLIF measurements of OH and kerosene for reliable single-pulse temperature and fuel measurements in lean jet engine combustors
Authors:
AuthorsInstitution or Email of Authors
Heinze, JohannesUNSPECIFIED
Behrendt, ThomasUNSPECIFIED
Meier, UlrichUNSPECIFIED
Schodl, RichardUNSPECIFIED
Date:3 August 2005
Status:Unpublished
Keywords:Laser diagnostics, combustion, temperature measurement, LIF
Event Title:13th Gordon Research Conference on Laser Diagnostics for Combustion
Event Location:Mount Holyoke College, MA (USA)
Event Type:international Conference
Event Dates:2005-07-31 - 2005-08-05
Organizer:Gordon Research Conferences (GRC)
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Dr.rer.nat. Johannes Heinze
Deposited On:11 Aug 2006
Last Modified:27 Apr 2009 05:03

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.