Ignition of Ethylene–Air and Methane–Air Flows by Low-Temperature Repetitively Pulsed Nanosecond Discharge Plasma

Bao, Ainan; Utkin, Yurii; Keshav, Saurabh; Lou, Guofeng; Adamovich, Igor V.

doi:10.1109/tps.2007.910143

Cited by 103 publications

(65 citation statements)

References 26 publications

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“…Recently, plasmaassisted combustion has been investigated as an innovative technology [1], which is expected to be useful for combustion in a lean-fuel condition [2,3] and in a speedy flow [4][5][6]. In addition, it is considered that plasmas can be utilized for improving the ignition characteristics [7][8][9][10][11] and the stability of flames [12,13]. Since the ignition in a lean-fuel condition of an automobile engine results in the reduction in the consumption of fossil fuels, plasma-assisted combustion could contribute greatly to the avoidance of global warming.…”

Section: Introductionmentioning

confidence: 99%

Transition from equilibrium to nonequilibrium combustion of premixed burner flame by microwave irradiation

Sasaki¹,

Sueoka²

2012

J. Phys. D: Appl. Phys.

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Abstract.We found that the burning velocity in premixed burner flame was enhanced by heated electrons in the flame. The electron heating was realized by irradiating microwave power onto the flame, and was confirmed by observing optical emission intensity of molecular nitrogen at the second positive system. Since the increase of the observed gas temperature was negligible, the enhancement of the burning velocity can be attributed to the nonequilibrium combustion chemistry which is driven by energetic electrons. We examined the time constants for the transition between equilibrium and nonequilibrium combustion states by irradiating pulsed microwave power. As a result, we found > 2 × 10 4 s −1 for the frequency of electron heating, ∼ 1 × 10 3 s −1 for the loss frequency of heated electrons, and ∼ (0.5 − 1) × 10 3 s −1 for the loss frequencies of OH and CH radicals.

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Section: Introductionmentioning

confidence: 99%

Transition from equilibrium to nonequilibrium combustion of premixed burner flame by microwave irradiation

Sasaki¹,

Sueoka²

2012

J. Phys. D: Appl. Phys.

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“…Several studies have shown recently, that the application of a nanosecond pulsed plasma to hydrocarbon combustion significantly increases the stability of premixed flames [1][2][3][4][5][6][7][8]. These studies have used either the reduction in the ignition delay time (IDT) or the extension in the lean flammability limit (LFL) [9] as evidence of flame stability enhancement resulting from the application of the plasma discharge.…”

Section: Introductionmentioning

confidence: 99%

The role of in situ reforming in plasma enhanced ultra lean premixed methane/air flames

Kim

Mungal

Cappelli

2010

Combustion and Flame

143

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“…Nonthermal plasmas appear interesting for their high energy efficiency, because the power consumption for the actuator is low with respect to heat release from the flame, and for the small temperature rise that they produce with a consequent low impact on thermal production of NO x . Several studies proved that plasma discharges improve the ignition of fuel/air mixtures [25,26], increase flame propagation [27], enhance flame stabilization [28,29], and extend flammability limits [30].…”

Section: Introductionmentioning

confidence: 99%

Flame Structure and Chemiluminescence Emissions of Inverse Diffusion Flames under Sinusoidally Driven Plasma Discharges

et al. 2017

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Reduction of nitric oxides (NO x ) in aircraft engines and in gas turbines by lean combustion is of great interest in the design of novel combustion systems. However, the stabilization of the flame under lean conditions is a main issue. In this context, the present work investigates the effects of sinusoidal dielectric barrier discharge (DBD) on a lean inverse diffusive methane/air flame in a Bunsen-type burner under different actuation conditions. The flame appearance was investigated with fixed methane loading (mass flux), but with varying inner airflow rate. High-speed flame imaging was done by using an intensified (charge-coupled device) CCD camera equipped with different optical filters in order to selectively record signals from the chemiluminescent species OH*, CH*, or CO 2 * to evaluate the flame behavior in presence of plasma actuation. The electrical power consumption was less than 33 W. It was evident that the plasma flame enhancement was significantly influenced by the plasma discharges, particularly at high inner airflow rates. The flame structure changes drastically when the dissipated plasma power increases. The flame area decreases due to the enhancement of mixing and chemical reactions that lead to a more anchored flame on the quartz exit with a reduction of the flame length.

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Ignition of Ethylene–Air and Methane–Air Flows by Low-Temperature Repetitively Pulsed Nanosecond Discharge Plasma

Cited by 103 publications

References 26 publications

Transition from equilibrium to nonequilibrium combustion of premixed burner flame by microwave irradiation

Transition from equilibrium to nonequilibrium combustion of premixed burner flame by microwave irradiation

The role of in situ reforming in plasma enhanced ultra lean premixed methane/air flames

Flame Structure and Chemiluminescence Emissions of Inverse Diffusion Flames under Sinusoidally Driven Plasma Discharges

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