Plasma-Assisted Control of Combustion Instabilities in Low-Emissions Combustors at Realistic Conditions

Campo, Felipe Gomez del

doi:10.2514/6.2019-3950

Cited by 3 publications

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the study, O 3 was generated by plasma discharge, and the spatial distribution of CH 2 O in the flame was investigated by PLIF. The results show that even a small amount of O 3 (2000 ppm) generated by plasma discharge will have a great impact on the flame propagation speed and flame lift-off height of the ethylene flame, and the addition of O 3 will greatly promote the conversion of C 2 H 4 to CH 2 O. Shanbhogue et al [17] used nanosecond pulsed discharge plasma to study syngas turbulent flames under pressurized conditions. Their results show that under pressurized conditions, especially in a lean burn flame, the introduction of nanosecond pulse discharge plasma can effectively improve the blow-out limit of the syngas flame and improve the stability of the flame.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Spectral Characteristics of Gliding Arc Plasma Assisted Ammonia Lean Combustion

et al. 2022

View full text Add to dashboard Cite

Ammonia as a non-carbon fuel is expected to play an important role in the future, but it is difficult to be effectively utilized at this stage due to its flame retardancy and other characteristics. Therefore, we propose to use gliding arc plasma combined with a swirl burner to enhance the combustion performance of ammonia. The electrical characteristics, electron density, gas rotational temperature and the distribution of key active species in the burner were studied via optical emission spectroscopy (OES). With the increase of equivalence ratio (EQR), the width of the Hα line decreases significantly, indicating that the electron density shows a downward trend, even as the gas rotational temperature shows an upward trend. When the equivalence ratio was 0.5, the gas rotational temperature increases by about 320 K compared with the pure air condition. During pure air discharge, there will still be obvious NO emission due to the plasma reaction, but with the addition of NH3, the NO content in the emission is significantly reduced. The light intensity of O atoms in the burner gradually decreases with the increase of the equivalence ratio, the light intensity of H atoms increases first and then decreases, and the light intensity of NH shows an upward trend. The reason may be that the plasma discharge effectively strengthens NH3(E)->NH2+H, NH2+H->NH+H2 and other reactions promote the initial reaction step of NH3 which thus effectively strengthens the NH3 combustion.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation on Spectral Characteristics of Gliding Arc Plasma Assisted Ammonia Lean Combustion

et al. 2022

View full text Add to dashboard Cite

show abstract

Diagnosis of the flow field in a plasma-controlled Rijke tube using time-resolved schlieren

Deng,

Li,

Gao

2024

International Journal of Thermal Sciences

View full text Add to dashboard Cite

Control of Large-Amplitude Combustion Oscillations Using Nanosecond Repetitively Pulsed Plasmas

Shanbhogue¹,

Pavan²,

Weibel³

et al. 2023

Journal of Propulsion and Power

View full text Add to dashboard Cite

This paper details the use of nanosecond repetitively pulsed discharges to attenuate combustion instabilities in a 14 kW swirl-stabilized methane/air combustor. The combustor exhibits large-amplitude pressure oscillations ranging from 1 to 4% of the mean pressure during which the flame exhibits bulk motion in each instability cycle, upstream and downstream, as revealed by high-speed chemiluminescence. Control is accomplished with an electrode comprising a pin anode at the centerline of the combustor, allowing a nanosecond spark to be generated in a region spanning close to the flame base, through the shear layers of the swirling flow and ending at the metallic combustor wall. The discharges are generated using 20 kV, 9 kHz pulses; and they correspond to about 120 W of mean power. This results in a suppression of the peak amplitude of the pressure oscillations by a factor of two to four, and 5 dB in the rms value. Using phase-averaged visualizations of the flame with and without plasma, we detail the sequence of flame motion in the course of the instability. With the plasma active, this reveals significant interactions between the flame and the plasma during the suppression. Finally, we present a state-space model of the thermoacoustic system, and we demonstrate open-loop control of the instabilities.

show abstract

Plasma-Assisted Control of Combustion Instabilities in Low-Emissions Combustors at Realistic Conditions

Cited by 3 publications

References 17 publications

Investigation on Spectral Characteristics of Gliding Arc Plasma Assisted Ammonia Lean Combustion

Investigation on Spectral Characteristics of Gliding Arc Plasma Assisted Ammonia Lean Combustion

Diagnosis of the flow field in a plasma-controlled Rijke tube using time-resolved schlieren

Control of Large-Amplitude Combustion Oscillations Using Nanosecond Repetitively Pulsed Plasmas

Contact Info

Product

Resources

About