Three-dimensional effects in counterflow heat-recirculating combustors

Chen, Chien‐Hua; Ronney, Paul D.

doi:10.1016/j.proci.2010.06.081

Cited by 48 publications

(15 citation statements)

References 25 publications

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“…Three-dimensional numerical simulations of spiral counter flow Swiss roll heat-recirculating combustors were performed including gas-phase conduction, convection and chemical reaction of propane-air mixtures, solid-phase conduction and surface-to-surface radiation. These simulations showed that in 3D model, results are surprisingly similar to the experimental date [7]. Zhong and Hong [8] numerically investigated the micro-scale combustor with counter current heat transfer with Computational Fluid Dynamics (CFD), the results revealed that methane conversion rate could be increased and the combustion stability could be enhanced with catalyst, but high wall temperature of the micro-combustor would lead to catalyst deactivation.…”

Section: Introductionmentioning

confidence: 60%

Numerical investigation on the combustion characteristics of methane/air in a micro-combustor with a hollow hemispherical bluff body

Zhang

Zhu

Yan

et al. 2015

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 60%

Numerical investigation on the combustion characteristics of methane/air in a micro-combustor with a hollow hemispherical bluff body

Zhang

Zhu

Yan

et al. 2015

Energy Conversion and Management

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“…Indeed, heat recirculation can effectively increase flame propagation speed at the near extinction condition. Several other works have also studied the impact of heat recirculation in small-scale combustion devices (Chen and Ronney, 2011;Kim, et al, 2007;Kuo and Ronney, 2007;Lee, et al, 2010;Gupta, 2010a, 2010b;Li, et al, 2016). By using a 2-D analytical model, Veeraragavan and Cadou (2011) indicated that heat loss to the environment actually reduces "net" heat recirculation.…”

Section: Premixed Combustion 321 Heat Recirculation-assisted (Excesmentioning

confidence: 99%

Progress in small-scale combustion

Nakamura

Gao

Matsuoka

2017

JTST

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This article briefly reviews the recent works related to small-scale combustion and its potential impact into combustion science and engineering is presented. Followed by a simple description of the scale effect on combustion to highlight its "unique" feature, past related works are then summarized. The impact of heat recirculation appearing in combustion systems, which is the most prominent feature of a micro-or small-scale combustion system, is focused upon and is understood that exactly the same strategy promising better combustion performance is confirmed irrespective of flame type (either premixed or non-premixed). With respect to this, paying attention to the entire combustor design, to optimize within the target working range is a crucial matter when micro-scale combustion is adopted. Potential subjects to be covered to further promote these aspects in this field are then presented.

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“…In heat recirculation micro-combustors, thermal energy transfers from combustion products to reactants in a counter-current manner, without mass transfer and allowing heat transfer to preheat the incoming cold mixtures (Shirsat and Gupta, 2011;Yan et al, 2015). The Ronney group has studied heat-recirculating micro-combustors, and found that there are an expansion in flammability limits of the system as compared with single channel micro-combustors Ronney, 2011 and. The operation of "Swiss-roll" combustors with gap sizes smaller than the quenching distance were achieved successful by Zhong and Wang (2010).…”

Section: Introductionmentioning

confidence: 99%

Flame Stability of Propane-Air Premixed Combustion in Heat-Recirculation Micro-Combustors

Chen¹,

Song²,

Gao³

et al. 2016

Frontiers in Heat and Mass Transfer

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The flame stability of single-pass heat-recirculation micro-combustors was investigated using computational fluid dynamics and compared to singlechannel micro-combustors with respect to critical heat loss coefficient and total power loss. The effect of wall thermal conductivity was also explored. The simulations show that heat recirculation profoundly affects blowout because of preheating of the cold incoming gases but has only minimal effect on extinction. In the limit of low-conductivity walls, the heat-recirculation micro-combustor is much more stable than the single-channel microcombustor. Under certain conditions, the heat recirculation micro-combustor can operate with room-temperature inlet and outlet streams and moderate outer wall temperatures while exhibiting high thermal and combustion efficiency.

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Three-dimensional effects in counterflow heat-recirculating combustors

Cited by 48 publications

References 25 publications

Numerical investigation on the combustion characteristics of methane/air in a micro-combustor with a hollow hemispherical bluff body

Numerical investigation on the combustion characteristics of methane/air in a micro-combustor with a hollow hemispherical bluff body

Progress in small-scale combustion

Flame Stability of Propane-Air Premixed Combustion in Heat-Recirculation Micro-Combustors

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