Studies on the Penetration of Fuel Spray in a Diesel Engine

Wakuri, Yutaro; Fujii, Masaru; Amitani, Tatsuo; Tsuneya, Reijiro

doi:10.1299/jsme1958.3.123

Cited by 251 publications

(83 citation statements)

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“…11 Table 5. On one hand, the results have been compared to the theoretical ones derived from the dimensional analysis and used by several authors such as Wakuri et al [28], Dent [29], Hiroyasu and Arai [30], Naber and Siebers [20], Payri et al [31] or Dernotte et al [32]: all these correlations keep the same exponents for the studied variables. The most significant difference is obtained in the dependence on the spreading angle where the value of the related exponent c varied from 0.09 (from experimental results) to 0.5 (from literature).…”

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

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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.

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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

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“…Numerous works have been studying the penetration of free sprays as a function of time although mostly under isothermal environments [47,89]. They produced empirical correlations -useful to predict the instant when the spray hits the piston wall-in which parameters such as pressure drop (difference between injection pressure and chamber backpressure), nozzle permeability (diameter and orifice discharge coefficient), ambient density, and spray angle reveal their controlling character.…”

Section: Morphological Characterization Of Spray Mixingmentioning

confidence: 99%

An Assessment of fuel physical and chemical properties in the combustion of a Diesel spray

Nerva¹

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Remerciements.À l'heure d'exprimer mes remerciements, je repenseà ce long voyage et le refaisà l'envers. Il aété long, difficile, pénible parfois même. J'ai la chance d'être arrivé au bout. J'y ai certainement beaucoup appris sur moi-même, mes vertus, mes limites, mes vices même. Il y aura indéniablement un avant et un après. Une chose m'apparaît commeévidente cependant: je n'ai pu en voir la fin que grâceà ceux qui m'ont accompagné et aux fructueuses rencontres que j'ai faites en chemin. J'associeévidemmentà ces remerciements le Dr. José Vicente Pastor Soriano pour la confiance et la liberté qu'il m'a accordées. Si commeà l'image d'une plante, un tuteur n'aide pas directementà grandir, il aide avant toutà pousser dans la bonne direction. Ainsi, il a su recadrer mon travail aux moments opportuns, contenir mes enthousiasmes, me soutenir dans les moments plus difficiles. En cela, il a parfaitement rempli la tâche qui lui incombait.Il serait difficile de ne pas citer ceux avec qui l'histoire a commencé : le Dr. José Galindo et Raúl Luján, avec qui j'ai réalisé mes premiers pas comme stagiaire, et qui m'ont en quelque sorte mis le piedà l'étrier. J'étais alors sans aucune maitrise de la langue, et ils ont eu la patience de m'enseigner leur métier et les joies de la programmation. Je les en remercie vivement. Elle s'est poursuivie par le master, la thèse, avec la participation de nombreux professeurs pour leurélaboration respective. Ainsi, je tiensà dire ma reconnaissance aux Drs. José María García Oliver, José Manuel Pastor, Jean Arrègle, Javier López, Ricardo Novella et Antonio García pour leur fine connaissance de la dynamique du jet Diesel et plus globalement des processus de combustion dans un environnement aussi hostile que celui d'une chambre de combustion. Ils ont représenté un soutien quasi-quotidien et leurs orientations bibliographiques m'ontété précieuses. Plusieurs tâches spécifiques ont nécessité le concours d'autres professeurs et chercheurs du Département. J'associe doncégalementà ces remerciements les Drs. Gabriela Bracho, Javier Salvador et Jaime Gimeno pour leur aide sur les taux d'introduction. Agradecimientos. A la hora a expresar mis agradecimientos, echo la vista atrás y recuerdo el viaje realizado. Fue largo, difícil, incluso doloroso. Tengo la suerte de haber llegado al final. Sin duda, aprendí mucho sobre mí mismo, mis virtudes, mis limitaciones, incluso mis vicios. Obviamente, habrá un antes y un después. Sin embargo hay algo que es obvio, y es que solo pude ver su termino gracias a los que me acompañaron, y a aquellos que he conocido y me han ayudado a lo largo del camino.Así pues, quiero dar las gracias en primer lugar al Departamento de Máquinas y Motores Térmicos, y en particular a sus dos dirigentes, el Dr. Francisco Payri y Dr. José María Desantes, por recibirme en su centro de investigación. También quiero agradecer al Ministerio de Investigación e Innovación Español por su apoyo económico y material, que me permitió realizar este trabajo, y poŕ ultimo, el desarrollo de esta tesis.In...

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“…A model was developed by Wakuri et al [8] based on momentum theory neglecting the relative motion between the fuel droplets and the surrounding air giving:…”

Section: Fuel Spray and Key Parameters Affecting Its Performancementioning

confidence: 99%

Evaluation of the Effect of Fuel Properties on the Fuel Spray and Jet Characteristics in a HGV DI Diesel Engine Operated by Used Cooking Oils

Dizayi

Tomlin

et al. 2014

AMM

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Fuel injection systems in modern diesel engines are designed and built to comply with very stringent environmental standards. They should also meet the highest level of fuel economy. Drivability, rapid response and easy and accurate control are a common demand. Changing the fuel characteristics could affect the performance of the fuel injection system. This study focuses on the evaluation of fuel spray characteristics of straight used cooking oil (SUCO) and its blends with petroleum diesel (PD) as a surrogate for pure PD. Used cooking oil blends have quite different physical properties from those of pure PD. Data for the lower heating value (LHV), density and viscosity were obtained from laboratory analysis. These data were merged with the physical and thermodynamic conditions of the diesel engine of interest to evaluate the dynamic behaviour of the fuel jet in 360° of crank rotation namely, the compression stroke, and the power stroke including the injection process. Engine operational conditions were calculated using a diesel dual thermodynamic cycle taking into account fuel injection adjustment at three different speeds, namely, idle speed, maximum torque speed and rated power speed.The results showed that fuel jet characteristics vary with SUCO content in the fuel blend. Two ranges of SUCO content in the blends were distinguished, 0 -80% SUCO content and 80 -100% SUCO content. Both showed a constant rate of change of jet characters per 10% increase in SUCO content in the fuel blend. Lower rates of change of fuel characters were observed at 0-80% SUCO content. The higher the temperature, the lower the rate of change of fuel jet characteristics.

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Studies on the Penetration of Fuel Spray in a Diesel Engine

Cited by 251 publications

References 0 publications

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

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

An Assessment of fuel physical and chemical properties in the combustion of a Diesel spray

Evaluation of the Effect of Fuel Properties on the Fuel Spray and Jet Characteristics in a HGV DI Diesel Engine Operated by Used Cooking Oils

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