Plasma Assisted Low Temperature Combustion

Ju, Yiguang; Lefkowitz, Joseph K.; Reuter, Christopher B.; Won, Sang Hee; Yang, Xiong; Yang, Suo; Sun, Wenting; Jiang, Zonglin; Chen, Qi

doi:10.1007/s11090-015-9657-2

Cited by 141 publications

(63 citation statements)

References 42 publications

(60 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As described above, the present experimental results suggest that atomic oxygen works more effectively than OH radicals for the improvement of the ignition property of the premixed burner flame. The importance of atomic oxygen has been pointed out in the literature; 4,5,[26][27][28] in addition, our previous work has concluded that the increase in burning velocity in a steady-state premixed burner flame is due to the production of atomic oxygen in the preheating zone by the superposition of DBD. 33) The contributions of metastable states of atomic oxygen [O( 1 D)] and Ar are another possible reason, but the densities of the metastable states in the effluent of DBD are expected to be negligible considering the rate coefficients of collisional quenching.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Effective species for ignition of premixed burner flame in effluent of dielectric barrier discharge

Sasaki¹,

Deguchi²

2018

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

The ignition probability of a premixed burner flame was improved in the effluent of a dielectric barrier discharge. In addition, the propagation speed of the flame kernel was increased by the dielectric barrier discharge. The increase in the propagation speed of the flame kernel was more significant in the region close to the nozzle of the effluent gas. We measured the spatial distributions of the densities of OH and atomic oxygen in the effluent. We found that the axial decay of the density of atomic oxygen was steeper than that of the OH density under the experimental conditions. By comparing the spatial distributions of the radical densities with that of the propagation speed of the flame kernel, we concluded that atomic oxygen works more effectively than OH in improving the ignition probability of the premixed burner flame.

show abstract

Section: Discussionmentioning

confidence: 99%

“…papers, 4,5,[26][27][28] whereas some papers point out the importance of OH. 29,30) In our previous works, we have examined the effect of the dielectric barrier discharge (DBD) on the burning velocity in a steady-state premixed burner flame.…”

mentioning

confidence: 99%

Effective species for ignition of premixed burner flame in effluent of dielectric barrier discharge

Sasaki¹,

Deguchi²

2018

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…In this stage, temperature sensitive reactions between radical and fuel further contribute to the of the consumption of O radical, and most production and consumption of OH radical [29,35].…”

Section: Stage Iiigap Between Pulsesmentioning

confidence: 99%

“…and second stage ignition to hot flame [35]. For fuels without LTC, there is no first stage ignition or "cool flame," and ignition is equivalent to the second stage in the two-stage ignition.…”

Section: Plasma Assisted Ignitionmentioning

confidence: 99%

Multiscale modeling and general theory of non-equilibrium plasma-assisted ignition and combustion

Yang¹,

Nagaraja²,

Sun³

et al. 2017

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

A self-consistent 1D theoretical framework for plasma assisted ignition and combustion is reviewed. In this framework, a "frozen electric field" modeling approach is applied to take advantage of the quasi-periodic behaviors of the electrical characteristics to avoid the recalculation of electric field for each pulse. The correlated dynamic adaptive chemistry (CO-DAC) method is employed to accelerate the calculation of large and stiff chemical mechanisms.The time-step is updated dynamically during the simulation through a three-stage multitimescale modeling strategy, which takes advantage of the large separation of timescales in nanosecond pulsed plasma discharges. A general theory of plasma assisted ignition and combustion is then proposed. Nanosecond pulsed plasma discharges for ignition and combustion can be divided into four stages. Stage I is the discharge pulse, with timescales of O(1-10 ns). In this stage, most input energy is coupled into electron impact excitation and dissociation reactions to generate charged/excited species and radicals. Stage II is the afterglow during the gap between two adjacent pulses, with timescales of O(100 ns). In this stage, quenching of excited species not only further dissociates O2 and fuel molecules, but also provides fast gas heating. the remaining gap between pulses, with timescales of O(1-100 μs). The radicals generated during Stages I and II significantly enhance the exothermic reactions in this stage. Stage IV is the accumulative effects of multiple pulses, with timescales of O(1 ms -1 sec), which include preheated gas temperatures and a large pool of radicals and fuel fragments to trigger ignition. For plasma assisted flames, plasma significantly enhances the radical generation and gas heating in the pre-heat zone, which could trigger upstream auto-ignition.Keywords: plasma assisted combustion, plasma fluid modeling, nanosecond plasma discharge, low temperature chemistry, ignition. Nomenclature

show abstract

“…Out of the radical pool generated by plasma, OH radicals are proven to play a key role in both ignition chemistry as well as combustion chemistry (6) . Numerical results indicated that OH radicals are much effective for reaction acceleration at low temperature regimes compared to high temperature thermal ignition regimes (7) . The plasma generated OH radicals initiate the hydrogen abstraction reactions, before the traditional path of chain branching reactions to take place for creation of radicals (8) .…”

Section: Introductionmentioning

confidence: 99%

Application of Microwave Enhanced Plasma to Control the Ignition Delay of Diesel Spray Combustion

Paidala

Khoi

Wachi

et al. 2017

IJAE

View full text Add to dashboard Cite

The effect of microwave enhanced plasma (MW Plasma) on ignition delay of diesel spray combustion was investigated inside a constant volume high pressure chamber. A microwave-enhanced plasma system, in which plasma discharge generated by a spark plug was amplified using microwave pulses, was used to introduce plasma to the injected spray before the occurrence of autoignition. High speed imaging of natural luminosity indicated an earlier appearance of flame in the with-plasma cases compared to the respective without-plasma conventional operation. These results corresponds well to the behavior of the heat-release rates, suggesting a reduction-effect by MW plasma on the ignition delay of diesel combustion.

show abstract

Plasma Assisted Low Temperature Combustion

Cited by 141 publications

References 42 publications

Effective species for ignition of premixed burner flame in effluent of dielectric barrier discharge

Effective species for ignition of premixed burner flame in effluent of dielectric barrier discharge

Multiscale modeling and general theory of non-equilibrium plasma-assisted ignition and combustion

Application of Microwave Enhanced Plasma to Control the Ignition Delay of Diesel Spray Combustion

Contact Info

Product

Resources

About