Laser-Induced Fluorescence Measurements and Modeling of Nitric Oxide Formation in High-Pressure Flames

Laser-Induced Fluorescence Measurements of Nitric Oxide Formation in High-Pressure Premixed Methane Flames

“…However, prompt-NO production is also significantly curtailed for highly fuel-rich combustion. Reisel and Laurendeau (1994) demonstrated the importance of the rate coefficient for Rxn. (9) with respect to the overall prediction of NO formation in rich ethane flames.…”

“…Very few measurements of NO have been made in high-pressure, lean, premixed flames (e.g. Fenimore, 1971;Heberling, 1976;Drake et al, 1990;Leonard and Correa, 230 M. S. KLASSEN et al 1990; Reisel and Laurendeau, 1994;1995).Most stationary gas-turbines operate in the range of 10-15 atm (aeroengines operate at pressure 2-3 times higher) (Correa and Smooke, 1990); thus, data at such pressures are critical for testing the performance of current kinetic models at higher pressures. Leonard and Correa (1990)found that NO x emissions showed little pressure dependence for lean, premixed, turbulent flames, both in experiments and computations.…”

“…Predictions of NO concentration are also provided for many of these flames. Previous LIF measurements in high-pressure C 2 H 6/02/N2 (Reisel and Laurendeau, 1994) and C 2H./02/N 2 (Reisel and Laurendeau, 1995) flames were mainly concerned with the effect of pressure on NO production. Hence, those studies focused on flames at near-stoichiometric to rich conditions -flames which displayed by far the largest effect of pressure on NO formation.…”

Imaging fluorescent combustion species in gas turbine flame tubes - On complexities in real systems

“…This method has been used successfully in high pressure flames. 19 This is the procedure used in the sector test rig. We found a linear response to seeding the flow with up to 200 ppm prior to combustion; however, after burning was initiated, we found that in the NO-doped flame the signal dropped by about 15 percent compared to the signal obtained without dopant.…”

“…However, recent studies have shown that NO LIF and PLIF at high pressure can succeed, through various approaches which include subtracting the O 2 background, doping the flame with NO, selective narrow-band filtering, and judicious laserline selection. [17][18][19][20] Fuel imaging challenges…”