Kinetics of NO Tag Formation in Air for Unseeded Molecular Tagging Velocimetry

Nandula, S.; Pitz, Robert W.; Bominaar, J.; Schoemaecker, Coralie; Dam, Nico; Meulen, JJ ter

doi:10.2514/6.2004-390

Cited by 4 publications

(5 citation statements)

References 24 publications

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“…RELIEF involves LIF probing of tagged vibrationally excited O 2 molecules, as in [6]. NO tagging velocimetry is conducted using naturally occurring NO, as in [7], by photodissociation of air [8,9], or by photodissociation of NO 2 [10,11]. In all three cases, reported studies have been limited to probing of the ground vibrational state of NO (NO v0 ) at 226 nm.…”

Section: Introductionmentioning

confidence: 99%

Molecular Tagging Using Vibrationally Excited Nitric Oxide in an Underexpanded Jet Flowfield

et al. 2009

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Section: Introductionmentioning

confidence: 99%

Molecular Tagging Using Vibrationally Excited Nitric Oxide in an Underexpanded Jet Flowfield

et al. 2009

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“…RELIEF in-volves LIF probing of tagged vibrationally excited O 2 molecules [9]. Tagging velocimetry using NO is usually conducted in shock tubes where NO is naturally formed, as in [10], or by photodissociation of air [11,12]. Danehy et al [10] employed NO fluorescence to image a hypersonic flowfield, where the displacement can be tracked over the fluorescence lifetime.…”

Section: Introductionmentioning

confidence: 99%

Two-Component Molecular Tagging Velocimetry Utilizing NO Fluorescence Lifetime and NO2 Photodissociation Techniques in an Underexpanded Jet Flowfield

Hsu

North

Srinivasan

et al. 2009

39th AIAA Fluid Dynamics Conference

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We report the application of molecular tagging velocimetry (MTV) toward two-component velocimetry as demonstrated in an underexpanded free jet flowfield. Two variants of the MTV technique are presented: 1) electronic excitation of seeded nitric oxide (NO) with gated fluorescence imaging (fluorescence lifetime) and 2) photodissociation of seeded NO 2 followed by NO fluorescence imaging (NO 2 photodissociation). The seeded NO fluorescence lifetime technique is advantageous in low-quenching, high-velocity flowfields, while the photodissociation technique is useful in high-quenching environments, and either highor low-velocity flowfields due to long lifetime of the NO photoproduct. Both techniques are viable for single-shot measurements, with determined root mean squared results for streamwise and radial velocities of ∼5%. This study represents the first known application of MTV utilizing either the fluorescence lifetime or the photodissociation technique toward two-component velocity mapping in a gaseous flowfield. Methods for increasing the spatial resolution to be comparable to particle-based tracking techniques are discussed.

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“…Various unseeded MTV methods have been developed-for example, Raman excitation plus laser-induced electronic fluorescence with O 2 as a tracer, [9][10][11][12] air photolysis and recombination tracking with NO as a tracer, [13][14][15][16] ozone tagging velocimetry with O 3 as a tracer, [17][18][19] and hydroxyl tagging velocimetry with OH as a tracer. [20][21][22][23] Raman excitation plus laser-induced electronic fluorescence has been successfully applied in a pure O 2 flow field, but its signal-to-noise ratio (SNR) in the air flow field is poor.…”

Section: Introductionmentioning

confidence: 99%

“…However, it might interfere with chemical reactions when applied in combustion flow fields because the tracer (NO) comes from the combustion improver (O 2 ). 15 Ozone tagging velocimetry can also be used in air flow fields, but the concentration of the tracer (O 3 ) is sensitive to the temperature of the flow field, which further influences its accuracy. Therefore the applicability of ozone tagging velocimetry in combustion flow fields remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Applicability of Femtosecond Laser Electronic Excitation Tagging in Combustion Flow Field Velocity Measurements

Zhang

Gao

et al. 2018

Appl Spectrosc

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Femtosecond laser electronic excitation tagging (FLEET) is a molecular tagging velocimetry technique that can be applied in combustion flow fields, although detailed studies of its application in combustion are still needed. We report the applicability of FLEET in premixed CH-air flames. We found that FLEET can be applied in all of the combustion areas (e.g., the unburned region, the burned region and the reaction zone). The FLEET signal in the unburned region is significantly higher than that in the burned region. This technique is suitable for both lean and rich CH-air combustion flow fields and its performance in lean flames is better than that in rich flames.

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Kinetics of NO Tag Formation in Air for Unseeded Molecular Tagging Velocimetry

Cited by 4 publications

References 24 publications

Molecular Tagging Using Vibrationally Excited Nitric Oxide in an Underexpanded Jet Flowfield

Molecular Tagging Using Vibrationally Excited Nitric Oxide in an Underexpanded Jet Flowfield

Two-Component Molecular Tagging Velocimetry Utilizing NO Fluorescence Lifetime and NO2 Photodissociation Techniques in an Underexpanded Jet Flowfield

Applicability of Femtosecond Laser Electronic Excitation Tagging in Combustion Flow Field Velocity Measurements

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