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Listar por palabra clave "Lift-off length"

Mostrando ítems 1-20 de 20

An experimental study of the effects of fuel properties on diesel spray processes using blends of single-component fuels

Vera-Tudela Fajardo, Walter Martin (Universitat Politècnica de València, 2015-12-16)

[EN] This last few years, the trend in diesel engines has been to use different kinds of fuels to identify their influence and behaviour on the emissions and performance. Among the wide variety of fuels employed are the ...
Analysis of spray/wall impingement using an ECN single-hole injector and a controlled-temperature wall under realistic engine conditions

Peraza, Jesús E; Payri, Raul; Gimeno, Jaime; Carvallo-Garcia, Cesar (Elsevier, 2022-05-25)

[EN] Spray¿wall interactions (SWI) directly affect fuel¿air mixture and emissions formation. Therefore, they are considered among the most critical physical processes in engine research nowadays. However, the physics of ...
Aplicación de la visualización de la combustión con cámara rápida a la comparación de combustibles de origen renovables

Rubio Jiménez, Marcos (Universitat Politècnica de València, 2020-05-12)

[ES] Durante los últimos años las leyes sobre contaminación cada vez son más restrictivas y esto lleva a ingenieros e investigadores a buscar soluciones que cumplan con la normativa establecida. Una de las estrategias ...
Aplicación de un modelo 1D de chorros a la predicción del autoencendido en condiciones de motores Diesel

Mora Morató, Joaquín (Universitat Politècnica de València, 2019-09-17)

[ES] El modelado de chorros permite describir el comportamiento del combustible al ser inyectado en la cámara de combustión de los motores de encendido por compresión, con implicaciones importantes sobre las prestaciones ...
Determinación y análisis de la longitud de despegue para la comprensión de la formación de hollín en una llama de inyección continua

Gil Martínez, Carlos (Universitat Politècnica de València, 2020-10-29)

[ES] La formación de hollín durante el proceso de combustión está fuertemente ligada a la longitud de despegue de la llama, ya que esta afecta de manera notable a la cantidad de aire englobado en el chorro de combustible. ...
Diesel ignition delay and lift-off length through different methodologies using a multi-hole injector

Payri, Raul; Salvador Rubio, Francisco Javier; Manin, Julien; Viera Sotillo, Alberto Antonio (Elsevier, 2016-01-15)

In this paper, lift-off 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 orifice ...
ECN Spray D visualization of the spray interaction with a transparent wall under engine-like conditions, Part II: Impinging spray combustion

Peraza, Jesús E; Payri, Raul; Gimeno, Jaime; Marti-Aldaravi, Pedro (Elsevier, 2022-01-15)

[EN] In spite of the ever more comprehensive studies on diesel combustion, there is still an important gap on the fundamental knowledge about the interaction of fuel sprays with the piston and cylinder walls in internal ...
Effect of the nozzle holder on injected fuel temperature for experimental test rigs and its influence on diesel sprays

Gimeno, Jaime; Marti-Aldaravi, Pedro; Carreres, Marcos; Peraza, Jesús E (SAGE Publications, 2018)

[EN] One of the test boundary conditions whose control is necessary for both experimental and numerical studies about the automotive engines research field is the temperature of the fuel inside the injector body during the ...
Engine combustion network: comparison of spray development, vaporization, and combustion in different combustion vessels

Bardi, Michele; Payri Marín, Raúl; Malbec, Louis Marie; Bruneaux, Gilles; Pickett, Lyle M.; Manin, Julien; Bazyn, Tim; Genzale, Caroline (Begell House, 2012)

Development and mixing of Diesel sprays are long known to be key factors for combustion and pollutant emissions but the related measurements in a real engine is not an easy task. This fact led researchers to simulate ...
ESTUDIO EXPERIMENTAL DE INYECCION-COMBUSTION DE CHORROS DIESEL EN ATMOSFERAS A ALTA PRESION Y ALTA TEMPERATURA

Arango Gómez, Jorge Eduardo (Universitat Politècnica de València, 2011-09-09)

Estudio experimental para toberas diesel mono orificio con diámetros de 70 y 90 micras, operando en atmosfera reactiva a condiciones controladas de presión, temperatura y concentración de oxigeno, donde inicialmente se ...
Experimental and numerical study of lift-off length and ignition delay of a two-component diesel surrogate

Payri, Raul; Viera Sotillo, Juan Pablo; Pei, Yuanjiang; Som, Sibendu (Elsevier, 2015-10-15)

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

Benajes Calvo, Jesus Vicente; Payri Marín, Raúl; Bardi, Michele; Marti-Aldaravi, Pedro (Elsevier, 2013-09)

In this work, lift-off length and ignition delay have been measured via chemiluminescence techniques in a wide range of conditions for a single-hole injector from the Engine Combustion Network (ECN) dataset and using a ...
Experimental study of the diesel spray behavior during the jet-wall interaction at high pressure and high temperature conditions

Peraza Ávila, Jesús Enrique (Universitat Politècnica de València, 2020-09-02)

[EN] The potential of diesel engines in terms of robustness, efficiency and energy density has made them widely used as power generators and propulsion systems. Specifically, fuel atomization, vaporization and air-fuel ...
Experimental Study of the Effect of Hydrotreated Vegetable Oil and Oxymethylene Ethers on Main Spray and Combustion Characteristics under Engine Combustion Network Spray A Conditions

Pastor, José V.; García-Oliver, José M; Mico Reche, Carlos; Garcia-Carrero, Alba Andreina; Gómez, Arantzazu (MDPI AG, 2020-08)

[EN] Featured Application This work contributes to the understanding of the macroscopic characteristics of the spray as well as to the evolution of the combustion process for alternative fuels. All these fuels have been ...
Experimental Study of the Fuel Effect on Diffusion Combustion and Soot Formation under Diesel Engine-Like Conditions

García Carrero, Alba Andreina (Universitat Politècnica de València, 2022-01-17)

[ES] Las emisiones de CO2 en el sector transporte se han incrementado considerablemente durante los últimos años debido al desarrollo económico mundial. El crecimiento de las flotas de transporte, junto con otros factores, ...
Experimental study of the injection conditions influence over n-dodecane and diesel sprays with two ECN single-hole nozzles. Part II: Reactive atmosphere

Payri, Raul; Salvador Rubio, Francisco Javier; Gimeno, Jaime; Peraza, Jesús E (Elsevier, 2016-10-15)

The second part of this experimental analysis, presented in this paper, seeks to go deep on the characterization of the Spray C and Spray D nozzles from the Engine Combustion Network, investigating the penetration of fuel ...
Fundamental spray and combustion measurements of soy methyl-ester biodiesel

NERVA, JEAN-GUILLAUME; Genzale, Caroline L.; Kook, Sanghoon; García Oliver, José María; Pickett, Lyle M. (SAGE Publications (UK and US), 2013-08)

Although biodiesel has begun to penetrate the fuel market, its effect on injection processes, combustion and emission formation under diesel engine conditions remains somewhat unclear. Typical exhaust measurements from ...
Mediciones de longitud de estabilización de llama, retraso del autoencendido y visualización de campo cercano en un inyector de tres orificios de la Engine Combustion Network

Viera Sotillo, Alberto Antonio (Universitat Politècnica de València, 2016-07-22)

[EN] This research is divided into two different set of experimental measurements. First combustion measurements of lift-off length were done via both broadband luminosity and OH chemiluminescence. In addition, ignition ...
The effect of nozzle geometry over ignition delay and flame lift-off of reacting direct-injection sprays for three different fuels

Payri, Raul; Viera-Sotillo, Juan Pablo; Gopalakrishnan, Venkatesh; Szymkowicz, Patrick (Elsevier, 2017)

[EN] The influence of internal nozzle flow characteristics over ignition delay, and flame lift-off of reacting direct-injection sprays is studied experimentally for three fuels using two different nozzle geometries. This ...
Understanding the effect of inter-jet spacing on lift-off length and ignition delay

Payri, Raul; Gimeno, Jaime; Carreres, Marcos; Montiel-Prieto, Tomas (Elsevier, 2021-08)

[EN] In recent years, injectors with multiple outlet-holes and smaller diameters have been implemented to reduce pollutant emissions during the combustion development. Nevertheless, increasing the number of holes has also ...