TY - GEN
T1 - Simultaneous single-shot lif-imaging of OH and UHC in a prevaporized, partially premixed, swirl-stabilized n-heptane flame
AU - Lachner, Rudolf
AU - Theisen, Daniel
AU - Fink, Rainer
AU - Rist, Dieter
AU - Schmid, Achim
AU - Bittlinger, Gerd
N1 - Publisher Copyright:
Copyright © 1998 by ASME.
PY - 1998
Y1 - 1998
N2 - The prevaporized, partially premixed, swirl-stabilized n-heptane flame in an atmospheric pressure combustor is investigated using a tuneable KrF excimer laser. Flashing the flame with a laser sheet tuned to the P2(8) line of OH (hydroxyl radical), single-shot images of the laser-induced signals are taken simultaneously with two ICCD-cameras aligned to the same measuring volume. One camera detects mainly the laser-induced fluorescence (LIF) from the 3⇒2 band of the OH plus signals from UHC (unburned hydrocarbons). Only broad-band emission from UHC is imaged onto the other camera. Comparing the two images, signals stemming from OH and UHC, respectively, can be distinguished. Pictures, taken in various planes along the main flow direction, reveal highly turbulent structures in the flame. High fluorescence signals from OH can obviously be found both in filament-like flame fronts lying between fresh combustible mixtures and hot combustion products as well as in broadened reaction regions.
AB - The prevaporized, partially premixed, swirl-stabilized n-heptane flame in an atmospheric pressure combustor is investigated using a tuneable KrF excimer laser. Flashing the flame with a laser sheet tuned to the P2(8) line of OH (hydroxyl radical), single-shot images of the laser-induced signals are taken simultaneously with two ICCD-cameras aligned to the same measuring volume. One camera detects mainly the laser-induced fluorescence (LIF) from the 3⇒2 band of the OH plus signals from UHC (unburned hydrocarbons). Only broad-band emission from UHC is imaged onto the other camera. Comparing the two images, signals stemming from OH and UHC, respectively, can be distinguished. Pictures, taken in various planes along the main flow direction, reveal highly turbulent structures in the flame. High fluorescence signals from OH can obviously be found both in filament-like flame fronts lying between fresh combustible mixtures and hot combustion products as well as in broadened reaction regions.
UR - http://www.scopus.com/inward/record.url?scp=84971642378&partnerID=8YFLogxK
U2 - 10.1115/98-GT-560
DO - 10.1115/98-GT-560
M3 - Conference contribution
AN - SCOPUS:84971642378
T3 - Proceedings of the ASME Turbo Expo
BT - Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1998
Y2 - 2 June 1998 through 5 June 1998
ER -