Interaction of the burning spherical droplets in oxygen-enriched turbulent environment

Cho, Chong Pyo; Kim, Ho Young; Yoon, Sam S.

doi:10.1016/j.combustflame.2008.10.026

Cited by 15 publications

(7 citation statements)

References 19 publications

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“…Figure 7 shows that the slope of (d/d 0 ) 2 increases noticeably when increasing turbulence intensity at typical elevated ambient pressure, indicating an enhancement of the droplet burning rate (similar trends were observed at higher ambient pressures; i.e., 6 bar and 11 bar). Tests were also performed at ambient pressure of 16 present paper due mainly to the fact that the images become sootier with increasing ambient pressure which made it problematic for image processing, and also the burning happens so fast with increasing ambient pressure which made it difficult for our camera to capture enough images to acquire a reliable information. Figure 8a and b present the effect of ambient pressure on the droplet burning rate at two typical turbulence intensities.…”

Section: Turbulence Characterizationmentioning

confidence: 99%

“…Saito et al [15] also reported an enhanced droplet burning rate at atmospheric conditions due to acoustic oscillations. Cho et al [16], in a numerical study, reported that turbulence intensity of a free airstream has a marginal effect on the burning rate of a stationary droplet under elevated ambient conditions (2.02T c and 0.47P c where T c and P c are the fuel critical temperature and pressure, respectively). Similar conclusion was also reported by Beck et al [17], who investigated numerically the effect of turbulence intensity on a moving burning droplet in a hot (0.88T c and 1.43T c ) airstream at atmospheric pressure.…”

Section: Introductionmentioning

confidence: 98%

“…The effect of forced flow/convection on hydrocarbon droplet combustion has been studied quite extensively under laminar flow conditions and therefore there is a wealth of knowledge (see, e.g., recent references [1][2][3][4][5][6][7][8][9][10], and references cited therein, M. Birouk ( ) · S. L. Toth Department of Mechanical Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada e-mail: madjid.birouk@umanitoba.ca to cite only a few). However, studies reporting on the effect of a turbulent or an acoustic field are quite limited (e.g., [11][12][13][14][15][16][17]). Birouk et al [11] investigated experimentally the combustion of a suspended hydrocarbon droplet under turbulent flow environment at atmospheric/room conditions.…”

Section: Introductionmentioning

confidence: 99%

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Hydrocarbon Droplet Turbulent Combustion in an Elevated Pressure Environment

Birouk

Toth

2015

Flow Turbulence Combust

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New experimental data on the effect of turbulence on the combustion of nheptane and n-decane droplet at elevated pressure are reported. Turbulent flow field in the central volume of a spherical vessel was generated by a set of eight axial fans. Flow characterization demonstrated that turbulence is isotropic and homogeneous within the 40 mm central volume of the vessel. The combustion of n-heptane and n-decane droplet was examined by varying turbulence intensity via the fans rotational speed and ambient pressure and temperature inside the vessel/chamber. Results showed that droplet burning rate becomes sensitive to turbulence only at elevated ambient pressure. Droplet flame extinction was found to depend on the heat loss from the droplet envelop flame, which increases with turbulence intensity.

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Section: Turbulence Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Hydrocarbon Droplet Turbulent Combustion in an Elevated Pressure Environment

Birouk

Toth

2015

Flow Turbulence Combust

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“…That is, spray may be assumed as an ensemble of droplets and, hence, its understanding could be achieved through knowledge gained from the examination of a single droplet. That is why most published work on spray combustion was performed on a single droplet (e.g., Abramzon and Sirignano, 1989;Birouk and Fabbro, 2013;Faeth, 1983;Law, 1982;Sirignano, 1983;Yan and Aggarwal, 2006) or an array of droplets to account for their interactions (e.g., Chauveau et al, 2011;Cho et al, 2009;Dwyer et al, 2000;Imaoka and Sirignano, 2005;Lee et al, 2010;Lefebvre, 1989;Segawa et al, 2005;Umemura et al, 1981, Wu and Sirignano, 2011a, 2011bZoby et al, 2011;and references cited therein). However, although the idealized "single droplet" case study may not be able to replicate the more complex spray phenomenon, it is still capable of revealing useful knowledge that can help advance our understanding of two-phase combustion.…”

Section: Introductionmentioning

confidence: 99%

A Hydrocarbon Droplet Evaporating in Turbulent Environment at Elevated Ambient Pressure and Temperature

Birouk

2014

Combustion Science and Technology

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This study presents new experimental results on the vaporization process of hydrocarbon droplet in a turbulent environment at elevated ambient pressure and temperature conditions. n-Heptane and n-decane, which provide a wide range of hydrocarbons properties, were tested. The initial droplet diameter was on the order of 1 mm, and its surrounding ambient consisted of varying turbulence intensity up to 3.10 m/s, pressure up to 16 bar, and temperature up to 150 • C. The results revealed that the hydrocarbon droplet followed the d 2 -law throughout its entire lifetime under all ambient conditions explored here. Increasing the ambient pressure increases the droplet vaporization lifetime, whereas increasing the ambient temperature reduces the droplet lifetime. More importantly, turbulence becomes more effective as ambient pressure increases, whereas it diminishes with increasing the ambient temperature. The experimental data were used to develop a more comprehensive hydrocarbons droplet mass transfer correlation.

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“…[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] Cho et al 20 studied liquid fuels. Murphy and Shaddix 7 and Smart et al 10 assessed coal and biomass.…”

Section: Energetic Aspects Of the Oec Usementioning

confidence: 99%

Critical evaluation of the oxygen-enhanced combustion in gas burners for industrial applications and heating systems

Santos¹,

Torres²,

Pereira³

2011

J. Braz. Chem. Soc.

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O conceito de eficiência energética em equipamentos está cada vez mais em pauta com os desdobramentos do aquecimento global e, dentre os equipamentos industriais, os queimadores possuem um dos maiores impactos nesta discussão por se tratar de um equipamento de combustão industrial. A procura por queimadores mais eficientes energeticamente é imprescindível para o adequado uso de combustíveis fósseis durante a fase de transição entre esta fonte de energia para as energias alternativas, a qual pode durar mais de cinquenta anos. O presente trabalho traz uma avaliação do uso da técnica de combustão enriquecida com oxigenio (OEC), identificando importantes pontos, especialmente na transferência de calor e na emissão de poluentes, para a aplicação desta técnica na indústria de petróleo e sua cadeia, na qual a utilização da OEC é raramente usada. Não foi identificada na literatura uma revisão crítica do uso da OEC e as implicações do seu uso na indústria de petróleo e gás.The concept of energetic efficiency in equipments is highlighted nowadays, due to its implication with the global warming issues. Amongst industrial equipments, burners have one of the greatest impacts on this discussion, since they are large scale combustion devices. The search for more efficient burners is of paramount importance, toward a more adequate use of the fossil fuels, during the transition phase between this energy source and new alternatives, which may last more than fifty years. The present work brings an evaluation of the Oxygen Enhanced Combustion technique (OEC), identifying important issues, especially those related with the heat transfer and emission of pollutants, and discussing its application in the oil industry and its supply chain, where the OEC is barely used. As far as the authors could search in the literature, there are no published critical reviews regarding the use of OEC and its implications in the oil and gas industry.

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Interaction of the burning spherical droplets in oxygen-enriched turbulent environment

Cited by 15 publications

References 19 publications

Hydrocarbon Droplet Turbulent Combustion in an Elevated Pressure Environment

Hydrocarbon Droplet Turbulent Combustion in an Elevated Pressure Environment

A Hydrocarbon Droplet Evaporating in Turbulent Environment at Elevated Ambient Pressure and Temperature

Critical evaluation of the oxygen-enhanced combustion in gas burners for industrial applications and heating systems

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