Atomization performance of petroleum coke and coal water slurries from a twin fluid atomizer

Daviault, Stephane G.; Ramadan, Omar; Matida, Edgar; Hughes, Patrick M.; Hughes, Robin W.

doi:10.1016/j.fuel.2012.02.042

Cited by 69 publications

(40 citation statements)

References 30 publications

(28 reference statements)

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“…Pastor et al [23] defined the angle of two straight lines that are fitted to the first 60% of the spray closest to the nozzle as the spray angle. Kang et al [24] defined the spray angle as the angle of an imaginary spray cone that possesses the same magnitude of cross-sectional area to the spray area when the height of the spray cone is spray penetration. Daviault et al [25] used two orthogonal lines to the nozzle axis at two axial distances from the injector tip to define four points on the edge of the spray, and then used these four points to define two lines, yielding two half-angles relative to the injector axis.…”

Section: B Critical Recess Lengthmentioning

confidence: 99%

Effects of Recess on the Self-Pulsation Characteristics of Liquid-Centered Swirl Coaxial Injectors

Kang

Cheng

et al. 2016

Journal of Propulsion and Power

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The self-pulsation characteristics of liquid-centered swirl coaxial injectors have been investigated using a Photron Fastcam SA-1.1 camera and a PULSE system (B&K Corp., 3650 type). The effects of both recess length and injection condition were analyzed and discussed. The flow pattern in the recess chamber of a liquid-centered swirl coaxial injector can be classified into three types, namely, outer, critical, and inner mixing flow. Once the critical flow approaches, self-pulsation is about to occur. When self-pulsation occurs, the spray oscillates with a Christmas tree shape. The Christmas-tree-like spray periodically produces droplet clusters, making horizontal spray width and mass flux oscillate periodically. Self-pulsation is the strongest when the flow is around the critical mixing flow. Both variations of recess length and injection condition can change the flow pattern in the recess chamber. When the flow pattern moves away from the critical mixing flow, self-pulsation is suppressed. All the frequency behaviors of selfpulsation indicate that self-pulsation is strongly related to Kelvin-Helmholtz instability. A possible mechanism of selfpulsation is also presented. This mechanism interprets the experiments of the present study and the results of literature well. Nomenclature D = diameter or distance, m h = film thickness, m k = specific heat ratio L = length, m _ m = mass flow rate, kg∕s P = pressure, Pa R = swirling radius or gas constant T = temperature, K u = axial velocity, m∕s w = circumferential velocity, m∕s α = spray angle, deg Δ = difference θ = convergent angle of the pressure swirl injector, deg μ = dynamic viscosity, Pa · s ρ = density, kg∕m 3 σ = pressure ratio φ = recess angle, deg Subscripts a = atmosphere cr = critical l = liquid li = liquid injector g = gas ir = inner or = outer r = recess s = swirl chamber t = tangential hole

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Section: B Critical Recess Lengthmentioning

confidence: 99%

Effects of Recess on the Self-Pulsation Characteristics of Liquid-Centered Swirl Coaxial Injectors

Kang

Cheng

et al. 2016

Journal of Propulsion and Power

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“…The capability to process highly viscous liquids is advantageous in several areas, especially in the combustion of heavy fuels, liquid wastes (Buckner et al, 1990;Ferreira et al, 2009;Jedelsky et al, 2009;Kermes et al, 2008;Loebker et al, 1998), coal-water (Chawla, 1985;Daviault et al, 2012;Jagannathan et al, 2011), and coke sludge slurries. It also helps in the spray drying of food (with suspensions of water and gelatinized native corn starch or native waxy corn starch, Schröder et al, 2011) and pharmaceutical and consumer products (PEO solutions (Broniarz-Press et al, 2010) such as water-oil emulsions (Broniarz-Press et al, 2009;Schröder et al, 2012), black liquor (Risberg and Marklund, 2009), and liquids for fluid catalytic cracking (Jolodar et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Twin-fluid atomization of viscous liquids: The effect of atomizer construction on breakup process, spray stability and droplet size

Mlkvik

Stähle

Schuchmann

et al. 2015

International Journal of Multiphase Flow

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“…The results showed that the PCOS engine can run smoothly, and that the maximum output power decreased under conditions of 1200 and 1600 r/min by about 6.2% and 19% while the maximum brake thermal efficiency was found to be lower by about 5.8% and 4.2%, in comparison with diesel fuel operation [11]. The resultant slurries were subjected to rheological characterizations, including the apparent viscosity and yield stress.…”

Section: Introductionmentioning

confidence: 99%

Combustion, performance and emission of a diesel engine fuelled with diesel doped with carbon black

Wamankar

Murugan

2015

Energy

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Atomization performance of petroleum coke and coal water slurries from a twin fluid atomizer

Cited by 69 publications

References 30 publications

Effects of Recess on the Self-Pulsation Characteristics of Liquid-Centered Swirl Coaxial Injectors

Effects of Recess on the Self-Pulsation Characteristics of Liquid-Centered Swirl Coaxial Injectors

Twin-fluid atomization of viscous liquids: The effect of atomizer construction on breakup process, spray stability and droplet size

Combustion, performance and emission of a diesel engine fuelled with diesel doped with carbon black

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