The Influence of Injection Parameters on Diesel Spray Characteristics

Arrégle, Jean; Pastor, Javier; Ruíz, Santiago

doi:10.4271/1999-01-0200

Cited by 75 publications

(41 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nozzle V1-2, which has the largest basic hole diameter, also has the largest droplet diameter. This is in agreement with the references, which specifies the injector hole diameter as the main criterion for the droplet size [16][17][18][19]. This is also the cause of the smallest droplet diameter of nozzle V4-2, which has the smallest exit diameter of all variants.…”

Section: Macroscopic Spray Parameterssupporting

confidence: 78%

Optical analysis of the influence of injector hole geometry on mixture formation in gasoline direct injection engines

Wetzel

2016

Automot. Engine Technol.

View full text Add to dashboard Cite

New and increasingly strict emission standards demand a reduction in the raw emissions from today's gasoline direct injection engines. The optimisation of mixture formation by means of the injector and, in particular, the injector hole geometry offers significant potential in this respect. To achieve this, however, it is crucial to have a basic understanding of the influence of the geometry on spray breakup. To investigate this influence, a test matrix with ten different injector hole geometries was created. This included cylindrical, convergent, divergent and stepped injector holes. Different measuring techniques were used to analyse the microscopic and macroscopic spray parameters as well as the internal flow in the nozzles.

show abstract

Section: Macroscopic Spray Parameterssupporting

confidence: 78%

Optical analysis of the influence of injector hole geometry on mixture formation in gasoline direct injection engines

Wetzel

2016

Automot. Engine Technol.

View full text Add to dashboard Cite

show abstract

“…2). This has been observed as well by Arrègle et al (1999), resulting in a tiny injection pressure exponent in equation 12 (0.00943, while exponent for nozzle diameter is 0.508 and exponent for ambient density is 0.335, proving that the injection pressure does not really affect spray angle). Considering that, many spray models don't take into account the injection pressure in their equations.…”

Section: Analysis and Validationmentioning

confidence: 82%

Spray Atomization Models in Engine Applications, from Correlations to Direct Numerical Simulations

Santos

Moyne

2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

Résumé -Modèles de spray dans les applications moteur, des corrélations aux simulations numériques directes -Les sprays sont parmi les principaux facteurs de qualité, dans la formation du mélange et la combustion, dans un grand nombre de moteurs (à combustion interne). Ils sont de toute première importance dans la formation de polluants et l'efficacité énergétique, bien qu'une modélisation adéquate soit encore en développement. Pour un grand nombre d'applications, la validation et la calibration de ces modèles demeurent une question ouverte. Aussi, présentons-nous un aperçu des modèles existants et proposons quelques voies d'amélioration. Les modèles sont classés en nondimensionnels et dimensionnels allant de formules simples dédiées à des applications proches du temps réel à des descriptions détaillées des premiers stades de l'atomisation. Abstract -Spray Atomization Models in Engine Applications

show abstract

“…in [27], the spray penetration behaves in two different manners during the injection: the first stage is characterized by a linear dependence with time, whereas in a second stage the spray is fully developed and the penetration is proportional to the square root of time. As it has been seen in the previous results, the penetration during the first part of the injection is difficult to predict through a conventional model since some features related to the dynamic behavior of the injector are important at this stage.…”

Section: Discussionmentioning

confidence: 99%

Engine combustion network: Influence of the gas properties on the spray penetration and spreading angle

Payri

Bardi

et al. 2014

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

In this work, three Engine Combustion Network (ECN) single-hole nozzles with the same nominal characteristics have been tested under a wide range of conditions measuring spray penetration and spreading angle. n-dodecane has been injected in nonevaporative conditions at different injection pressures ranging from 50 to 150 MPa and several levels of ambient densities from 7.6 to 22.8 kg/m 3 . Nitrogen and Sulphur Hexafluoride (SF 6 ) atmospheres have been explored and,in the first case, a temperature sweep from 300 to 550 K at constant gas density has been executed. Mie scattering has been used as the optical technique by employing a fast camera, whereas image processing has been performed through a home-built Matlab code. Differences in spray penetration related to spray orifice diameter, spreading angle and start of injection transient have been found for the three injectors. Significant differenceshave been obtained when changing the ambient gas, whereas ambient temperature hardly affects the spray characteristics up to 400 K. However, a reduction in penetration has been observed beyond this point, mainly due to the sensitivity limitation of the technique as fuel evaporation becomes important. The different behavior observed when injecting in different gases could be explained due to the incomplete momentum transfer between spray droplets and entrained gas, together with the fact that there is an important change in speed of sound for the different gases, which affects the initial stage of the injection.

show abstract

The Influence of Injection Parameters on Diesel Spray Characteristics

Cited by 75 publications

References 14 publications

Optical analysis of the influence of injector hole geometry on mixture formation in gasoline direct injection engines

Optical analysis of the influence of injector hole geometry on mixture formation in gasoline direct injection engines

Spray Atomization Models in Engine Applications, from Correlations to Direct Numerical Simulations

Engine combustion network: Influence of the gas properties on the spray penetration and spreading angle

Contact Info

Product

Resources

About