Combustion of straight glycerol with/without methane using a fuel-flexible, low-emissions burner

Jiang, Lulin; Agrawal, Ajay K.

doi:10.1016/j.fuel.2014.07.027

Cited by 47 publications

(12 citation statements)

References 29 publications

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“…Direct combustion of glycerol has been achieved by heating the fuel to reduce the kinematic viscosity of the fuel so that it can be atomized, and by heating the oxidizer to overcome the high ignition temperature of glycerol [17,18]. Jian and Agrawal were able to achieve stable combustion of neat glycerol without preheating the fuel by using a novel flow-blurring liquid fuel injector in an insulated combustor [19].…”

Section: Preferential Vaporization Of Wet Fuelsmentioning

confidence: 99%

Spray breakup and structure of spray flames for low-volatility wet fuels

Madero

Axelbaum

2017

Combustion and Flame

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Studies of high-water-content fuels (a.k.a, wet fuels) have demonstrated that, under proper conditions, stable combustion can be achieved at very high water concentrations. Stable spray flames of wet fuels have been attained with fuel/water mixtures having stoichiometric adiabatic flame temperatures as low as 251 °C. In this study we investigate low-volatility wet fuels, using glycerol as the fuel, and ethanol as a stabilization additive. This study expands on previous work by determining the minimum amount of ethanol that needs to be added to a glycerol/water mixture to produce a stable flame and by investigating the spray dynamics and structure for these fuels, to delineate the mechanism of ignition and to understand how ethanol alters the vaporization behavior, droplet breakup, and spray dynamics. Detailed 2-D velocity, Sauter mean diameter (SMD), 2-D flux, and number concentration measurements were performed with a Phase Doppler Particle Analyzer (PDPA) in sprays of three fuel/water mixtures: a) 30% glycerol/70% water, b) 30% glycerol/10% ethanol/60% water, and c) the same mixture as b) but in a combusting spray. All percentages are by weight. Results show that the addition of ethanol to the glycerol/water mixture turns the hollow cone spray pattern into a narrow full cone pattern, leading to recirculation of fine droplets in the region just downstream of the nozzle, which is essential to ignition. The high concentration of fine droplets, along with the high vapor pressure and high activity coefficient of ethanol leads to extremely rapid vaporization of ethanol in the inner recirculation zone. The combustion of the ethanol raises the temperature in this region, while the swirling flow brings heat

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Section: Preferential Vaporization Of Wet Fuelsmentioning

confidence: 99%

Spray breakup and structure of spray flames for low-volatility wet fuels

Madero

Axelbaum

2017

Combustion and Flame

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“…With the development of The Times, the engine has new requirements for fuel adaptability. Jatropha oil (Hashimoto et al, 2014), CME (canola methyl ester), DME (dimethyl ether, CH3OCH3) (Lee and Yoon, 2012), and other alternative fuel (Nascimento et al, 2008;Erazo et al, 2010;Jiang and Agrawal, 2014;Li et al, 2019) have received much development and attention. Fuel adaptability has also led to the development of dual-fuel engines (Korakianitis et al, 2011;Lounici et al, 2014;Yang et al, 2014;Sun et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Fuel-Switching of Dual-Fuel Gas Turbine Combustor

et al. 2022

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To research the fuel-switching rules for gas turbine dual-fuel combustor, the effects of fuel change rate, fuel compensation rate, permissible fluctuation limit of outlet temperature, and fuel matching on the fuel-switching performance were studied experimentally by using a real dual-fuel gas turbine combustor. The experimental results show that increasing fuel change rate can reduce fuel-switching time, but the influence of fuel viscosity and evaporative atomization combustion hysteresis leads to the increase of outlet temperature amplitude fluctuation. The fuel compensation rate corresponds to the optimal solution for this combustion chamber; when the fuel change rate decreases, the optimal fuel compensation coefficient will be increase. Meanwhile, by increasing the allowable fluctuation range of outlet temperature and reducing the difference of calorific value of natural gas and diesel, the fuel-switching time can be effectively reduced, and the fuel-switching stability can be improved.

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“…Carbon monoxide (CO) emission was observed to have been lowered by approximately 87% as CO2 blending ratio increased by 10% on volume basis. Jiang and Agrawal [13] utilised gas turbine swirl burners with a flow-blurring (FB) atomiser to examine methane/glycerol dual fuel combustion. The presence of methane promotes glycerol evaporation rate significantly.…”

Section: Introductionmentioning

confidence: 99%

Effects of swirler vane angle on palm biodiesel/natural gas combustion in swirl-stabilised gas turbine combustor

Chiong

Valera‐Medina

Chong

et al. 2020

Fuel

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Combustion characteristics of palm biodiesel/methyl esters (PME) and natural gas (NG) blend were examined using a model gas turbine swirl burner at vane angle (θ) 30°, 45° and 60°. A twin fluid air blast atomiser was utilised for atomising liquid fuel at air-to-liquid ratio (ALR) 2.50.Swirling flow was initiated by using an axial swirler as main air passed through it. Combustible mixture was formed as swirling air flow mixed up with liquid fuel spray at burner outlet. Flame colour for PME/NG was mainly bluish, resembling that of neat PME despite subtle liftoff was observed in PME/NG swirl flames. Flame spectroscopic analysis showed that PME/NG swirl flames were more intense than baseline PME. Furthermore, θ = 60° operation led to significantly lower reaction intensity. Meanwhile, PME/NG combustion with 20%-30% NG input power fraction was observed to lower nitric oxide (NO) emission by a factor of 2.7 when compared with diesel and neat PME in θ = 60° combustion. Novel empirical models for emissions were also proposed, enabling the estimation of NO emission from PME/NG combustion at different NG input power proportions and vane angle. This research shows that PME/NG combustion is a promising way of reducing NO emission against neat PME and diesel in gas turbine operation.Moreover, flame instability provoked by liftoff in dual fuel operation is not aggravated, mainly due to nullification by intensified global reaction when NG is added. Such attributes feature PME/NG as a viable alternative fuel for use in land-based power generation gas turbines.

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Combustion of straight glycerol with/without methane using a fuel-flexible, low-emissions burner

Cited by 47 publications

References 29 publications

Spray breakup and structure of spray flames for low-volatility wet fuels

Spray breakup and structure of spray flames for low-volatility wet fuels

Experimental Study on Fuel-Switching of Dual-Fuel Gas Turbine Combustor

Effects of swirler vane angle on palm biodiesel/natural gas combustion in swirl-stabilised gas turbine combustor

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