Numerical Modeling of Quasi-DC Plasma-Assisted Combustion for Flame Holding Cavity

Zhou, Siyin; Nie, Wei; Che, Xueke

doi:10.1080/00102202.2016.1193494

Cited by 9 publications

(7 citation statements)

References 14 publications

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“…Considering our research purposes and the plasma ignition model characteristics, a hydrogen/air one-step combustion kinetic model is adopted. 16 One-step combustion kinetic models of hydrogen, methane, and ethylene have been tested and used to solve a variety of combustion and detonation problems, as given in references. 6,21,22 Although the one-step kinetic model cannot exactly reproduce all properties of the hydrogen-air mixture for flames, detonation, and others, it can give a reasonable approximation of the length and time scales for the problem studied here based on the comparisons of the basic parameters of the detonation wave between the theory values and computational data.…”

Section: Model and Calculation Methodsmentioning

confidence: 99%

“…According to equation 1for quasi-DC discharge plasma power, there is a relationship between the plasma heat source zone temperature and the plasma power, and therefore, we can establish the plasma phenomenological model: when we consider the effect of plasma, we treat the zone as a controllable heat source and equate the temperature in this zone to the quasi-DC discharge plasma temperature, which has been validated and used in references. [14][15][16] However, we do not treat the zone under these conditions when there is no plasma present.…”

Section: Physical Model and Numerical Methods 21 Quasi-dc Discharge mentioning

confidence: 99%

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Study of plasma-assisted detonation initiation by quasi-direct current discharge

Zhou

Shi

Nie

2020

International Journal of Spray and Combustion Dynamics

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To study the effects of quasi-direct current discharge plasma on the initiation of a pulse detonation engine at multiple locations, we proposed a double-zones quasi-direct current discharge plasma ignition scheme. Based on the establishment of the plasma-assisted detonation initiation model, the process of detonation wave formation in the mixture of hydrogen and air by single and double ignition zone were studied by numerical method. The wave structure, component evolution history, and Zeldovich–von Neumann–Döring curve after forming a stable detonation wave were all discussed. The simulation results indicate that due to its higher total ignition energy and the synchronous propagation of multiple compression waves, double-zone plasma ignition has a 17.9% shorter deflagration to detonation transition time and 14.2% lower detonation distance compared to the single-zone scheme. The double-zone scheme does not modify the peak flow field temperature and pressure when the stable detonation wave is formed, resulting in smoother pressure and temperature increases.

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Section: Model and Calculation Methodsmentioning

confidence: 99%

Section: Physical Model and Numerical Methods 21 Quasi-dc Discharge mentioning

confidence: 99%

Study of plasma-assisted detonation initiation by quasi-direct current discharge

Zhou

Shi

Nie

2020

International Journal of Spray and Combustion Dynamics

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“…The ability of our numerical methods for simulating the multispecies reaction flow field of the scramjet combustor with a cavity has been validated and can be found in [14,18].…”

Section: Simulation Validationmentioning

confidence: 99%

“…There in three primary mechanisms of the plasma effect on flow and combustion can be summarized: (1) momentum transfer, (2) fast local ohmic heating of the medium, and (3) active particles [6,7,14]. Ignoring the magnetic field, the mechanism of quasi-DC discharge plasma affecting a supersonic flow is mainly its fast local heating rather than the electrostatic force (i.e., the momentum transfer mechanism) [10,15,16].…”

Section: Introductionmentioning

confidence: 99%

Plasma-Assisted Combustion

Zhou¹,

Wang²,

Nie³

et al. 2019

Plasma Science and Technology - Basic Fundamentals and Modern Applications

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As a promising technology, plasma-assisted combustion (PAC) has attracted many researchers to explore the effect of PAC on improving the combustion in propulsion devices, such as scramjet, detonation engines, internal engines, and so on. In this chapter, we aim to exhibit the influence of quasi-DC discharge plasma on the operating performance of scramjet combustor and find the internal mechanisms, which may contribute to the development of PAC technology in supersonic combustion. For case one, a plasma filament is generated upstream of fuel jet through quasi-DC discharge in a scramjet combustor; for case two, the plasma is formed across the backward facing step of a flame holding cavity to improve the flame stabilization of the cavity in the scramjet combustor. The two cases are investigated in detail through three-dimensional numerical simulation based on the dominant thermal blocking mechanism. Important parameters including temperature distribution, separation zone, water production, stagnation pressure loss, combustion efficiency, cavity drag, mass exchange rate, and cavity oscillating characteristics are obtained and analyzed. It shows that the quasi-DC discharge plasma does benefit for the improvement of the combustion in a scramjet combustor.

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“…A six species seven reactions mechanism is chosen as the O 2 -H 2 chemical kinetic model with finite rate reaction model been used to simulate the combustion. The dynamic processes of detonation wave formation and its propagation are both well captured by the simulation program, and details about related equations, physical models, solving methods, verification, and validation can be found in [4,33,38].…”

Section: Simulation Of Detonation Initiationmentioning

confidence: 99%

Effect of actuating voltage and discharge gap on plasma assisted detonation initiation process

Zhou

Che

Nie

et al. 2018

Plasma Sci. Technol.

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The influence of actuating voltage and discharge gap on plasma assisted detonation initiation by alternating current dielectric barrier discharge was studied in detail. A loose coupling method was used to simulate the detonation initiation process of a hydrogen-oxygen mixture in a detonation tube under different actuating voltage amplitudes and discharge gap sizes. Both the discharge products and the detonation forming process assisted by the plasma were analyzed. It was found that the patterns of the temporal and spatial distributions of discharge products in one cycle keep unchanged as changing the two discharge operating parameters. However, the adoption of a higher actuating voltage leads to a higher active species concentration within the discharge zone, and atom H is the most sensitive to the variations of the actuating voltage amplitude among the given species. Adopting a larger discharge gap results in a lower concentration of the active species, and all species have the same sensitivity to the variations of the gap. With respect to the reaction flow of the detonation tube, the corresponding deflagration to detonation transition (DDT) time and distance become slightly longer when a higher actuating voltage is chosen. The acceleration effect of plasma is more prominent with a smaller discharge gap, and the benefit builds gradually throughout the DDT process. Generally, these two control parameters have little effect on the amplitude of the flow field parameters, and they do not alter the combustion degree within the reaction zone.

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Numerical Modeling of Quasi-DC Plasma-Assisted Combustion for Flame Holding Cavity

Cited by 9 publications

References 14 publications

Study of plasma-assisted detonation initiation by quasi-direct current discharge

Study of plasma-assisted detonation initiation by quasi-direct current discharge

Plasma-Assisted Combustion

Effect of actuating voltage and discharge gap on plasma assisted detonation initiation process

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