Development and Application of Imaging System to Evaluate Liquid and Vapor Envelopes of Multi-Hole Gasoline Fuel Injector Sprays Under Engine-Like Conditions

Parrish, Scott; Zink, Ronald J.

doi:10.1615/atomizspr.2012006215

Cited by 43 publications

(23 citation statements)

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“…is chamber is not only able to reproduce the thermodynamic conditions of a Diesel engine, but also, compared to other high-pressure hightemperature vessels [15][16][17], has the unique feature of presenting nearly quiescent and steady thermodynamic conditions within the chamber, allowing to test wide range of conditions and multiple repetitions without the penalty of long testing periods [12,13]. e facility can be divided into four parts: compressors, heaters, test vessel and control system.…”

Section: Spray Chamber and Injection Systemmentioning

confidence: 99%

Diesel ignition delay and lift-off length through different methodologies using a multi-hole injector

et al. 2016

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Elsevier Payri, R.; Salvador Rubio, FJ.; Viera Sotillo, AA. (2016). Diesel ignition delay and lift-off length through different methodologies using a multi-hole injector. Applied Energy. 162:541-550. doi:10.1016Energy. 162:541-550. doi:10. /j.apenergy.2015 Raúl Payri, F.J. Salvador, Julien Manin, Alberto Viera; Diesel ignition delay and li -o length through di erent methodologies using a multi-hole injector. Applied Energy, 2015, 162, 541-550. Diesel ignition delay and li -o length through di erent methodologies using a multi-hole injector AbstractIn this paper, li -o length has been measured via both broadband luminosity and OH chemiluminescence. In addition, ignition delay has also been measured via broadband chemiluminescence and Schlieren imaging. A 3 ori ce injector from the Engine Combustion Network (ECN) set, referred to as Spray B, and a single component fuel (n-dodecane) was used. Experiments were carried out in a constant ow and pressure facility, that allowed to reproduce engine-like thermodynamic conditions, and enabled the study to be performed over a wide range of test conditions with a very high repetition rate. Data obtained was also compared with results from a single ori ce injector also from the Engine Combustion Network, with analog ori ce characteristics (90 micrometer outlet diameter and convergent shape) and technology as the injector used . Results showed that there is good correlation between the ignition delay measured through both methodologies, that oxygen concentration and injection pressure plays a minor role in the ignition delay, being ambient temperature and density the parameters with the highest in uence. Li -o length measurements showed signi cant di erences between methodologies. Minor deviation was observed between injectors with di erent nozzle geometry (seat inclination angle), due to temperature variations along the chamber, highlighting the importance of temperature distribution along combustion vessels. Empirical correlations for li -o and ignition delay were calculated, underlining the e ect of the conditions on the parameters studied. Coe cients of the correlations were compared with results for the single ori ce injector, this showed that variations of test conditions have the same impact on ignition delay and li -o length regardless the nozzle ori ce con guration.

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Section: Spray Chamber and Injection Systemmentioning

confidence: 99%

Diesel ignition delay and lift-off length through different methodologies using a multi-hole injector

et al. 2016

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“…Schlieren imaging has been successfully employed several times to characterize different aspects of the diesel spray [7] [30] sprays, this technique is able to depict the boundary between vaporized fuel and ambient gases because: (1) refractive index differ between the fuel and ambient gases and (2) density gradients are created in mixture as the vaporized fuel spray cools the mixture. With adequate image acquisition systems, this technique permits to characterize the spray even for fast response injectors and transient events [16].…”

Section: Ignition Delaymentioning

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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“…For vaporizing Diesel [25], [26] but also gasoline [27] sprays, this technique shows the boundary between vaporized fuel and ambient gases because (1) refractive index differences exist between the fuel and ambient gases and (2) density gradients are created in mixture as the vaporized fuel spray cools the mixture. The good temporal resolution of this technique allows characterizing the spray even for a fast response injectors [28].…”

Section: Schlieren Imagingmentioning

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

150

126

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Development and Application of Imaging System to Evaluate Liquid and Vapor Envelopes of Multi-Hole Gasoline Fuel Injector Sprays Under Engine-Like Conditions

Cited by 43 publications

References 0 publications

Diesel ignition delay and lift-off length through different methodologies using a multi-hole injector

Diesel ignition delay and lift-off length through different methodologies using a multi-hole injector

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

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

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