Ultrafast heating in nanosecond discharges in atmospheric pressure air

D. L. Rusterholtz; D. Z. Pai; G. D. Stancu; D. A. Lacoste; C. O. Laux

doi:10.2514/6.2012-509

Ultrafast heating in nanosecond discharges in atmospheric pressure air

D. L. Rusterholtz^*, D. Z. Pai, G. D. Stancu, D. A. Lacoste, C. O. Laux

^*Corresponding author for this work

Research output: Contribution to conference › Paper › peer-review

17 Scopus citations

Abstract

Nanosecond Repetitively Pulsed Discharges have been proven to be efficient in flame stabilization. A two-step mechanism was proposed to explain the increased reactivity afforded by the discharge. This mechanism first creates excited electronic states of nitrogen, which then dissociate molecular oxygen through quenching reactions. In this paper, we investigated the temperature of the gas during and after the discharge using Optical Emission Spectroscopy on the second positive system of nitrogen, and simulated spectra from SPECAIR. The spatial profiles of excited nitrogen species densities in the discharge were determined using Abel-inverted spectra of the first and second positive system of nitrogen. The time evolution of the absolute density of N₂(B) and N₂(C) was also determined and the quenching rates of N₂(B) and N₂(C) by collisions with O₂ were found to be 2.5 (±0.5)× 10^-10 cm³.s^-1 and 5.2 (±0.5)× 10^-10 cm³.s ^-1 at 2000 K.

Original language	English (US)
DOIs	https://doi.org/10.2514/6.2012-509
State	Published - 2012
Externally published	Yes
Event	50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Nashville, TN, United States Duration: Jan 9 2012 → Jan 12 2012

Other

Other	50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Country/Territory	United States
City	Nashville, TN
Period	01/9/12 → 01/12/12

ASJC Scopus subject areas

Aerospace Engineering

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10.2514/6.2012-509

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abstract = "Nanosecond Repetitively Pulsed Discharges have been proven to be efficient in flame stabilization. A two-step mechanism was proposed to explain the increased reactivity afforded by the discharge. This mechanism first creates excited electronic states of nitrogen, which then dissociate molecular oxygen through quenching reactions. In this paper, we investigated the temperature of the gas during and after the discharge using Optical Emission Spectroscopy on the second positive system of nitrogen, and simulated spectra from SPECAIR. The spatial profiles of excited nitrogen species densities in the discharge were determined using Abel-inverted spectra of the first and second positive system of nitrogen. The time evolution of the absolute density of N2(B) and N2(C) was also determined and the quenching rates of N2(B) and N2(C) by collisions with O2 were found to be 2.5 (±0.5)× 10-10 cm3.s-1 and 5.2 (±0.5)× 10-10 cm3.s -1 at 2000 K.",

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T1 - Ultrafast heating in nanosecond discharges in atmospheric pressure air

AU - Rusterholtz, D. L.

AU - Pai, D. Z.

AU - Stancu, G. D.

AU - Lacoste, D. A.

AU - Laux, C. O.

PY - 2012

Y1 - 2012

N2 - Nanosecond Repetitively Pulsed Discharges have been proven to be efficient in flame stabilization. A two-step mechanism was proposed to explain the increased reactivity afforded by the discharge. This mechanism first creates excited electronic states of nitrogen, which then dissociate molecular oxygen through quenching reactions. In this paper, we investigated the temperature of the gas during and after the discharge using Optical Emission Spectroscopy on the second positive system of nitrogen, and simulated spectra from SPECAIR. The spatial profiles of excited nitrogen species densities in the discharge were determined using Abel-inverted spectra of the first and second positive system of nitrogen. The time evolution of the absolute density of N2(B) and N2(C) was also determined and the quenching rates of N2(B) and N2(C) by collisions with O2 were found to be 2.5 (±0.5)× 10-10 cm3.s-1 and 5.2 (±0.5)× 10-10 cm3.s -1 at 2000 K.

AB - Nanosecond Repetitively Pulsed Discharges have been proven to be efficient in flame stabilization. A two-step mechanism was proposed to explain the increased reactivity afforded by the discharge. This mechanism first creates excited electronic states of nitrogen, which then dissociate molecular oxygen through quenching reactions. In this paper, we investigated the temperature of the gas during and after the discharge using Optical Emission Spectroscopy on the second positive system of nitrogen, and simulated spectra from SPECAIR. The spatial profiles of excited nitrogen species densities in the discharge were determined using Abel-inverted spectra of the first and second positive system of nitrogen. The time evolution of the absolute density of N2(B) and N2(C) was also determined and the quenching rates of N2(B) and N2(C) by collisions with O2 were found to be 2.5 (±0.5)× 10-10 cm3.s-1 and 5.2 (±0.5)× 10-10 cm3.s -1 at 2000 K.

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Ultrafast heating in nanosecond discharges in atmospheric pressure air

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