Meier, Ulrich and Freitag, Stefan and Heinze, Johannes and Lange, Lena and Magens, Eggert and Schroll, Michael and Willert, Christian and Hassa, Christoph and Bagchi, Imon-Kalyan and Lazik, Waldemar and Whiteman, Michael (2013) Characterization of Lean Burn Module Air Blast Pilot Injector With Laser Techniques. Journal of Engineering for Gas Turbines and Power, 135 (12), pp. 121508-1. American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4025148. ISSN 0742-4795.
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Official URL: http://gasturbinespower.asmedigitalcollection.asme.org/
Abstract
For lean burn combustor development in low emission aero-engines, the pilot stage of the fuel injector plays a key role with respect to stability, operability, NOx emissions, and smoke production. Therefore it is of considerable interest to characterize the pilot module in terms of pilot zone mixing, fuel placement, flow field, and interaction with the main stage. This contribution focuses on the investigation of soot formation during pilotonly operation. Optical test methods were applied in an optically accessible single sector rig at engine idle conditions. Using planar laser-induced incandescence (LII), the distribution of soot and its dependence on air/fuel ratio, as well as geometric injector parameters, was studied. The data shows that below a certain air/fuel ratio, an increase of soot production occurs. This is in agreement with smoke number measurements in a standard single sector flame tube rig without optical access. Reaction zones were identified using chemiluminescence of OH radicals. In addition, the injector flow field was investigated with PIV. A hypothesis regarding the mechanism of pilot smoke formation was made based on these findings. This along with further investigations will form the basis for developing strategies for smoke improvement at elevated pilot-only conditions.
Item URL in elib: | https://elib.dlr.de/87214/ | ||||||||||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||||||||||
Title: | Characterization of Lean Burn Module Air Blast Pilot Injector With Laser Techniques | ||||||||||||||||||||||||||||||||||||
Authors: |
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Date: | December 2013 | ||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Journal of Engineering for Gas Turbines and Power | ||||||||||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||||||||||
Volume: | 135 | ||||||||||||||||||||||||||||||||||||
DOI: | 10.1115/1.4025148 | ||||||||||||||||||||||||||||||||||||
Page Range: | pp. 121508-1 | ||||||||||||||||||||||||||||||||||||
Editors: |
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Publisher: | American Society of Mechanical Engineers (ASME) | ||||||||||||||||||||||||||||||||||||
ISSN: | 0742-4795 | ||||||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||||||
Keywords: | aero-engine gas turbine, soot, combustor, lean burn, laser diagnostics | ||||||||||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||||||||||
HGF - Program: | Aeronautics | ||||||||||||||||||||||||||||||||||||
HGF - Program Themes: | Propulsion Systems (old) | ||||||||||||||||||||||||||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||||||||||||||||||||||||||
DLR - Program: | L ER - Engine Research | ||||||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | L - Combustion Chamber Technologies (old) | ||||||||||||||||||||||||||||||||||||
Location: | Köln-Porz | ||||||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Propulsion Technology > Combustor | ||||||||||||||||||||||||||||||||||||
Deposited By: | Meier, Dr.rer.nat. Ulrich | ||||||||||||||||||||||||||||||||||||
Deposited On: | 07 Jan 2014 14:51 | ||||||||||||||||||||||||||||||||||||
Last Modified: | 08 Mar 2018 18:42 |
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