NO2-based laser-induced fluorescence (LIF) technique to measure cold-flow mixing

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:5419099

Gulati, A; Warren, JR, R E ^[1]

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1. General Electric Co., Schenectady, NY (United States)

The paper examines the sensitivity and resolution capabilities of NO2-based laser-induced fluorescence (LIF) for studying cold-flow mixing in high-pressure applications. Calibrated fuel-air mixtures with known NO2 concentrations are investigated with LIF in cases of high pressures of up to 200 psig. The redshifted fluorescence is monitored during excitation by a CW argon-ion laser, and attention is given to the effects of pressure and mixture composition on signal quenching. Calibration is used to account for the quenching effects, and a resolution of 0.2 percent of the fuel stream is demonstrated at atmospheric pressures. At very high pressures the dynamic range is reduced, and some practical considerations are discussed regarding the practical application of the technique. The technique is shown to resolve small fuel-air eddies with good spatial and temporal resolution when applied to the study of a turbulent jet in coflowing air. 9 refs.

• OSTI ID: 5419099
• Report Number(s): AIAA-Paper-92-0511; CONF-920157-
• Resource Relation: Conference: 30. American Institute of Astronautics and Aeronautics (AIAA) aerospace sciences meeting and exhibit, Reno, NV (United States), 6-9 Jan 1992
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
FUEL-AIR RATIO
MEASURING METHODS
AIR FLOW
DIAGNOSTIC TECHNIQUES
FLUORESCENCE
GASES
HIGH PRESSURE
MIXING
NITROGEN DIOXIDE
PRESSURE EFFECTS
RESOLUTION
SENSITIVITY
TURBULENT FLOW
CHALCOGENIDES
FLUID FLOW
FLUIDS
GAS FLOW
LUMINESCENCE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
420400* - Engineering- Heat Transfer & Fluid Flow