Simulation of spray combustion in a lean-direct injection combustor

Patel, Nayan; Kirtas, M.; Sankaran, Vaidyanathan; Menon, Suresh

doi:10.1016/j.proci.2006.07.232

Cited by 45 publications

(16 citation statements)

References 21 publications

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“…The primary swirler is applied to introduce high-velocity air, thus promote atomization. The purpose of secondary swirler is the presence of a vortex breaking bubble [19], thus resulting in the formation recirculation zones. The venturi and flare are assembled to promote fuel air mixing and avoid flash back.…”

Section: Experimental Methodologymentioning

confidence: 99%

Lean blowout limits of a gas turbine combustor operated with aviation fuel and methane

Xiao

Huang

2015

Heat Mass Transfer

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Section: Experimental Methodologymentioning

confidence: 99%

Lean blowout limits of a gas turbine combustor operated with aviation fuel and methane

Xiao

Huang

2015

Heat Mass Transfer

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“…Raju [47] compared different empirical atomization models and showed that the empirical atomization models seem to be modest for some spray cases. The empirical atomization model is still being used in a wide range of applications [20][21][22]48]. In this paper, the breakup model by Tanner [49], which is more applicable to the high-pressure diesel engine, is used for the modelling of the droplet atomization processes.…”

Section: Atomization Modelmentioning

confidence: 99%

“…Pael and Menon [20][21][22] carried out a two-phase reacting LES in a gas turbine chamber. In their work, LES turbulencecombustion interaction is modelled via linear eddy model, the spray analysis is based on a Lagrangian droplet model which includes empirical evaporation and secondary breakup model, and the reaction is modelled with a global multi-step mechanism.…”

Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of kerosene spray combustion in a model scramjet chamber

Zhang

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part G:

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Large-eddy simulation (LES) of kerosene spray combustion in a model supersonic combustor with cavity flame holder is carried out. Kerosene is injected through the ceiling of the cavity. The subgrid-scale (SGS) turbulence stress tensor is closed via the Smagorinsky's eddyviscosity model, chemical source terms are modelled by a finite rate chemistry (FRC) model, and a four-step reduced kerosene combustion kinetic mechanism is adopted. The chamber wall pressure predicted from the LES is validated by experimental data reported in literature. The test case has a cavity length of 77 mm and a depth of 8 mm. After liquid kerosene is injected through the orifice, most of the droplets are loaded with recirculation fluid momentum inside the cavity. Due to lower velocity of the carrier fluid inside the cavity, sufficient atomization and evaporation take place during the process of droplet transportation, resulting in a rich fuel mixture of kerosene vapour accumulating inside the cavity. These rich fuel mixtures are mixed with fresh air by the approach Q1 mixing layer at the front of the cavity and are thus involved in burning accompanied with the approach boundary layer separation extending towards upstream. The combustion flame in the downstream impinges onto the rear wall of the cavity and is then reflected back to the front of the cavity. During the recirculation of hot flow, heat is compensated for evaporation of droplets. The circulation processes mentioned above provide an efficient flame-holding mechanism to stabilize the flame. Comparisons with results from a shorter length of cavity (cavity length of 45 mm) show that, due to insufficient atomization and evaporation of the droplets in the short distance inside the cavity, parts of the droplets are carried out of the cavity through the boundary layer fluctuation and evaporated in the hot flame layer, thus resulting in incomplete air fuel mixing and worse combustion performance. The flow structures inside the cavity play an important role in the spray distribution, thus determining the combustion performance.

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“…Among the limited number of LES studies on two-phase turbulent flows involving droplet evaporation and combustion, we refer here to the works by Okong'o & Bellan [49], Leboissetier et al [50], Sankaran and Menon [51]; Patel et al [52] Ham et al [53] Mahesh [54], Afshari et al [55] and Li & Jaberi [56], Cuenot et al [57]. In the first two papers, [49][50] the DNS data for a temporal mixing layer laden with evaporating droplets are used to assess (a priori and a posteriori) different SGS models for carrier gas, droplet and evaporated vapor.…”

Section: Numerical Simulation Of Spraymentioning

confidence: 99%

“…However, the mass, momentum and heat transfer between evaporated droplets and carrier gas are not accurately represented by the proposed deterministic closures. The two-phase reacting LES model in References [51][52] is based on the Euelrian-Lagrangian approach. In this model, the carrier gas equations are solved for a fixed threedimensional (3D) grid system.…”

Section: Numerical Simulation Of Spraymentioning

confidence: 99%