Ethanol droplet evaporation: Effects of ambient temperature, pressure and fuel vapor concentration

Pinheiro, Abgail Paula; Vedovoto, João Marcelo; Neto, Aristeu da Silveira; Wachem, Berend G. M. van

doi:10.1016/j.ijheatmasstransfer.2019.118472

Cited by 41 publications

(17 citation statements)

References 35 publications

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“…Pr and Sc numbers are calculated by assuming that the surface of the droplet is in thermodynamic equilibrium with the surrounding gas. For computations, an isolated ethanol droplet is injected at T=300 K and P=1 atm at the center of a large Cartesian cube with dimensions 10×10×10 cm 3 to avoid edge effects. The evaporation of the droplet is tracked until complete evaporation at constant temperature and stagnant ambient with pure N2 and burnt gases.…”

Section: Methodsmentioning

confidence: 99%

“…Ethanol is an extensively studied fuel as an oxygenated additive and it can be produced from bio-based processes. Many studies report the evaporation of pure ethanol and its mixtures under several conditions from both experimental and numerical aspects [1][2][3][4]. However, there are still many points to be clarified in terms of change in vaporization characteristics due to the presence of the flame and the dependency of vaporization rate on several parameters.…”

Section: Introductionmentioning

confidence: 99%

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Evaporation of a single ethanol droplet interacting with a premixed laminar CH4/air flame

Kaya

Renoux²,

Halter³

et al. 2021

ICLASS

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Among all phenomena occurring in liquid-fueled combustion chambers, one basic process is the interaction of droplets with the flame. Therefore, it is essential to understand the dynamics of an individual droplet interaction with a flame front in order to analyze more complex flames. The aim of this study is to investigate the evaporation of a single ethanol droplet interacting with a premixed laminar CH4/air flame. In the experimental part of the study, the droplet was injected into the stagnation flame. The visualization of the flame front and the temporal monitoring of the droplet evaporation were performed using optical technics (PIV, PTV, ILIDS). In the numerical part of the study, single droplet evaporation under constant temperature and stagnant environment was studied with the Eulerian-Lagrangian approach using the YALES2 solver. The variations of the droplet and gas properties were computed under N2 atmosphere and under flame conditions. From the vaporization rate calculations, it is observed that there is a slight effect of flame stretch due to the change in the temperature profile. It is also observed that the flame temperature has a dominant effect on the evaporation rate rather than the burnt gas composition.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaporation of a single ethanol droplet interacting with a premixed laminar CH4/air flame

Kaya

Renoux²,

Halter³

et al. 2021

ICLASS

View full text Add to dashboard Cite

show abstract

“…Sehingga uap bahan bakar terakumulasi dalam jumlah banyak yang akan meningkatkan burning rate [35]. Pinheiro et al [36] mengaitkan burning duration yang singkat dengan naiknya temperatur gas pembakaran. Temperatur droplet yang tinggi dengan semakin panjang rantai karbon menghasilkan burning duration yang lebih singkat pada asam stearat.…”

Section: Gambar 3: Ignition Delay Time Dan Burning Durationunclassified

Pengaruh Panjang Rantai Karbon dan Derajat Ketidakjenuhan terhadap Karakteristik Pembakaran Droplet Asam Lemak Tunggal

Ibadurrohman

Hamidi

Yuliati

2021

JRM

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This study aimed to investigate the effect of the different carbon chain lengths and the degree of unsaturation of six fatty acids as the constituent of vegetable oils. The droplet combustion was carried out at an ambient temperature and atmospheric pressure. The variation in the carbon chain length and the degree of unsaturation resulted in different physical and chemical properties of the fuel, which affect the droplet combustion characteristics. The increase of the carbon chain length results in longer ignition delay times and shorter burning durations, as well as higher droplet temperatures, burning rate constant, and specific power output. Conversely, an increase in the degree of unsaturation with the presence of double bond results in shorter ignition delay and longer burning duration, as well as higher droplet temperatures, but lower burning rate constant and specific power output. The droplet diameter evolution divides the combustion period into unsteady burning zones and quasi-linear burning zones. The flame dimension of unsaturated fatty acid is higher due to the soot formation at the top of the flame. A bluish flame related to the higher oxygen content in the molecule can be observed in saturated fatty acids. The short-chain saturated fatty acid has a large non-luminous zone because they are rich in oxygen. In contrast, the long-chain saturated fatty acid has a narrow non-luminous zone with high flame radiation.

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“…2019; Pinheiro et al. 2019; Ray, Raghavan & Gogos 2019). In spite of such improvements, often numerical predictions do not match with experiments and it is common to utilize correlations or semi-empirical parameters to improve the agreement with measurements (Maqua, Castanet & Lemoine 2008), a practice that hinders the understanding of the underlying physics controlling the vaporization of liquid fuels.…”

Section: Introductionmentioning

confidence: 99%

“…Recent improvements in calculation capabilities have motivated the formulation of new models that make use of more sophisticated physics to consider the unsteady evaporation of mono-and multicomponent droplets with variable fluid properties (Yang & Wong 2001;Sazhin 2006;Azimi et al 2017;Lupo & Duwig 2018;Fang et al 2019;Pinheiro et al 2019;Ray, Raghavan & Gogos 2019). In spite of such improvements, often numerical predictions do not match with experiments and it is common to utilize correlations or semi-empirical parameters to improve the agreement with measurements (Maqua, Castanet & Lemoine 2008), a practice that hinders the understanding of the underlying physics controlling the vaporization of liquid fuels.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and numerical analysis of the evaporation of mono- and multicomponent single fuel droplets

2021

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Ethanol droplet evaporation: Effects of ambient temperature, pressure and fuel vapor concentration

Cited by 41 publications

References 35 publications

Evaporation of a single ethanol droplet interacting with a premixed laminar CH4/air flame

Evaporation of a single ethanol droplet interacting with a premixed laminar CH4/air flame

Pengaruh Panjang Rantai Karbon dan Derajat Ketidakjenuhan terhadap Karakteristik Pembakaran Droplet Asam Lemak Tunggal

Theoretical and numerical analysis of the evaporation of mono- and multicomponent single fuel droplets

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