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Detection of very large ions in aircraft gas turbine engine combustor exhaust: charged small soot particles?
AbstractSmall electrically charged soot particles (CSP) present in the exhaust of a jet aircraft engine combustor have been detected by a Large Ion Mass Spectrometer and quantitatively measured by an Ion Mobility Analyzer. The size and concentration measurements which took place at an aircraft gas-turbine engine combustor test-rig at the ground covered different combustor conditions (fuel flow=FF, fuel sulphur content=FSC). At the high-pressure turbine stage of the engine, CSP-diameters were mostly around 6nm and CSP-concentrations reached up to 4.8×107cm−3 (positive and negative) corresponding to a CSP-emission index ECSP=2.5×1015 CSPkg−1 fuel burnt. The ECSP increased with FF but did not increase with FSC. The latter indicates that sulphur was not a major component of the large ions. Possible CSP-sources and CSP-sinks as well as CSP-roles are discussed.
Detection of very large ions in aircraft gas turbine engine combustor exhaust: charged small soot particles?
AbstractSmall electrically charged soot particles (CSP) present in the exhaust of a jet aircraft engine combustor have been detected by a Large Ion Mass Spectrometer and quantitatively measured by an Ion Mobility Analyzer. The size and concentration measurements which took place at an aircraft gas-turbine engine combustor test-rig at the ground covered different combustor conditions (fuel flow=FF, fuel sulphur content=FSC). At the high-pressure turbine stage of the engine, CSP-diameters were mostly around 6nm and CSP-concentrations reached up to 4.8×107cm−3 (positive and negative) corresponding to a CSP-emission index ECSP=2.5×1015 CSPkg−1 fuel burnt. The ECSP increased with FF but did not increase with FSC. The latter indicates that sulphur was not a major component of the large ions. Possible CSP-sources and CSP-sinks as well as CSP-roles are discussed.
Detection of very large ions in aircraft gas turbine engine combustor exhaust: charged small soot particles?
Wilhelm, S (author) / Haverkamp, H (author) / Sorokin, A (author) / Arnold, F (author)
Atmospheric Environment ; 38 ; 4561-4569
2004-04-20
9 pages
Article (Journal)
Electronic Resource
English
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