Investigation of the Response of an Air Blast Atomizer Combustion Chamber Configuration on Forced Modulation of Air Feed at Realistic Operation Conditions
Hassa, C. and Heinze, J. and Stursberg, K. (2003) Investigation of the Response of an Air Blast Atomizer Combustion Chamber Configuration on Forced Modulation of Air Feed at Realistic Operation Conditions. Transactions of the ASME - A - Engineering for Gas Turbines and Power, 125, pp. 862-878.
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DLR investigated forced combustion oscillations for two liquid fuel burners in a research combustion chamber at elevated pressures simulating idle conditions of aircraft engine combustors. The work was performed in close collaboration with Engler Bunte Institut of the university of Karlsruhe and MTU Munich. An existing combustion chamber with optical access, capable to operate up to 20 bar, was upgraded with an air flow pulsator, that bypasses air from the combustor plenum to the exhaust with a sinusoidal massflow variation up to 700 Hz. Pressure transducers in the plenum and the flametube monitored the forced disturbances. A photomultiplier recorded the OH* chemiluminescence of the flame. For the agreed operating conditions frequency scans of these values were registered. Additionally images of the OH* chemiluminescence were taken at selected frequencies and evaluated in a statistical manner, to separate turbulent and periodic behaviour. From the analysis of the pressure data, it can be concluded, that serious thermo-acoustic feedback was not observed for both burners. However burner 2 with the flame detached from the wall exhibited a higher fluctuation level as burner 1 with the wall attached flame. A resonant behaviour was observed near the characteristic frequency of the sound room comprised of plenum, flame tube and burner nozzle as connecting passage. The chemiluminescence images show different modes of spatial fluctuation for the burners and for burner 2 they also vary with the operating condition.
|Title:||Investigation of the Response of an Air Blast Atomizer Combustion Chamber Configuration on Forced Modulation of Air Feed at Realistic Operation Conditions|
|Journal or Publication Title:||Transactions of the ASME - A - Engineering for Gas Turbines and Power|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 862-878|
|Keywords:||Forced Combustion Oscillation, chemiluminescence, optical measurement techniques, air blast atomizer|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L ER - Engine Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L ER - Engine Research|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Institute of Propulsion Technology|
|Deposited By:||Dr.rer.nat. Johannes Heinze|
|Deposited On:||16 Sep 2005|
|Last Modified:||06 Jan 2010 13:33|
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