Effects of nozzle geometry on direct injection diesel engine combustion process

Payri, Raúl; Salvador, Francisco; Gimeno, J.; Morena, Joaquín De la

doi:10.1016/j.applthermaleng.2008.10.009

Cited by 120 publications

(105 citation statements)

References 26 publications

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“…As published in ( [3], [5], [19]) the use of conical orifices or with big rounding curvature radius at the orifice entrance, can reduce or even eliminate cavitation because they induce smooth pressure drop on the flow along the orifice axis. Also, the lower the length/diameter ratio, the higher the cavitation [19].…”

Section: Introductionmentioning

confidence: 99%

Large-eddy simulation analysis of the influence of the needle lift on the cavitation in diesel injector nozzles

Desantes

Salvador

Carreres

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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Cavitation phenomenon has a strong influence on the internal flow and spray development in diesel injector nozzles. Despite its importance, there are lots of aspects which remain still unclear, especially at partial needle lifts when the injector is in the opening and closing phases. For that reason, the current paper is focused on the influence of the needle lift on the internal flow in a diesel nozzle. This study has been carried out with 3D simulations at high injection pressure (160 MPa) using a homogeneous equilibrium model implemented in OpenFOAM to model cavitation phenomenon.The nozzle has been simulated with LES methods at six different needle lifts (10, 30, 50, 75, 100 and 250 μm), providing relevant information about the evolution of the internal flow, the turbulence development (vorticity, turbulence-cavitation interaction and turbulent structures) and the flow characteristics in the nozzle outlet (mass flow, momentum flux and effective velocity) with the needle position.

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Section: Introductionmentioning

confidence: 99%

Large-eddy simulation analysis of the influence of the needle lift on the cavitation in diesel injector nozzles

Desantes

Salvador

Carreres

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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“… Broadband chemiluminescence technique, to measure ignition delay [7], [10]  OH* chemiluminescence to measure steady LOL [9], [11] Both techniques are deeply described in the literature. Moreover, a special effort has been made to study the spray disappearance phenomenon observed when a Schlieren setup is used to study a reacting Diesel spray [7], [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Benajes

Payri

Bardi

et al. 2013

Applied Thermal Engineering

149

126

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“…Experiments were carried out in a novel constant-pressure-flow facility (CPF) [16][17], able to reach 15 MPa ambient pressure and 1000 K ambient temperature. The experiments focused in characterizing the ignition delay (ID) through the Schlieren technique [7][18] [19][27], and the lift-off length (LOL) through OH* chemiluminescence visualization [20] [21], at ECN suggested test conditions. The availability of such a robust and unique data-set provides a more effective crucible for model validation.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of lift-off length and ignition delay of a two-component diesel surrogate

Payri

Viera

Pei

et al. 2015

Fuel

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Elsevier Payri, R.; Viera Sotillo, JP.; Pei, Y.; Som, S. (2015). Experimental and numerical study of liftoff length and ignition delay of a two-component diesel surrogate. AbstractUnderstanding and controlling mixing and combustion processes is fundamental for the ever more demanding pollutant regulations and fuel consumption standards of direct injection diesel engines. The fundamentals of these processes haven been long studied from both experimental and numerical perspectives. As numerical models become more advanced, the need for adequate experimental data increases. Hence, experimental methodologies and scientific databases need to be enhanced with more quantitative, accurate, consistent, and reliable information in order to evaluate the models in a robust fashion. The present study seeks to enhance the current state-of-the-art by further evaluating the combustion performance of a two-

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Effects of nozzle geometry on direct injection diesel engine combustion process

Cited by 120 publications

References 26 publications

Large-eddy simulation analysis of the influence of the needle lift on the cavitation in diesel injector nozzles

Large-eddy simulation analysis of the influence of the needle lift on the cavitation in diesel injector nozzles

Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Experimental and numerical study of lift-off length and ignition delay of a two-component diesel surrogate

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