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Browsing by Subject "Ignition delay"

Now showing items 1-20 of 23

A new method to predict high and low-temperature ignition delays under transient thermodynamic conditions and its experimental validation using a Rapid Compression-Expansion Machine

Desantes Fernández, José Mª; Bermúdez, Vicente; López, J. Javier; López Pintor, Darío (Elsevier, 2016-09-01)

A new procedure to predict both high-temperature stage and cool flames ignition delays under transient thermodynamic conditions has been developed in this paper. The results obtained have been compared with those obtained ...
Correlations for the ignition characteristics of six different fuels and their application to predict ignition delays under transient thermodynami conditions

Desantes, J.M.; Bermúdez, Vicente; López, J. Javier; López-Pintor, Darío (Elsevier, 2017)

[EN] The ignition characteristics of six different fuels have been correlated as a function of the temperature, pressure, equivalence ratio and oxygen molar fraction in this investigation. More specifically, the ignition ...
Design of synthetic EGR and simulation study of the effect of simplified formulations on the ignition delay of isooctane and n-heptane

Desantes, J.M.; López, J. Javier; Molina, Santiago; López Pintor, Darío (Elsevier, 2015-05-15)

[EN] A method to create synthetic mixtures that simulate the Exhaust Gas Recirculation (EGR) of an internal combustion engine, using O2, N2, CO2, H2O and Ar, has been designed. Different simplifications of this synthetic ...
Diseño de EGR sintético y estudio, mediante simulación, de la validez de sus distintas simplificaciones en relación a la obtención de tiempos de retraso para isoctano y n-heptano

López Pintor, Darío (Universitat Politècnica de València, 2015-06-19)

[EN] A method to create synthetic mixtures which simulate the EGR of an internal combustion engine, using O2, N2, CO2, H2O and Ar, has been designed. Different simplifications of this synthetic EGR have been validated in ...
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 ...
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 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 ...
Experimental validation and analysis of seven different chemical kinetic mechanisms for n-dodecane using a Rapid Compression-Expansion Machine

Desantes, J.M.; López, J. Javier; García-Oliver, José M; López-Pintor, Darío (Elsevier, 2017-08)

[EN] Seven different chemical kinetic mechanisms for n-dodecane, two detailed and five reduced, have been evaluated under Engine Combustion Network (ECN) thermodynamic conditions by comparison to experimental measurements ...
Experimental validation of an alternative method to predict high and low-temperature ignition delays under transient thermodynamic conditions for PRF mixtures using a Rapid Compression-Expansion Machine

Desantes Fernández, José Mª; Bermúdez, Vicente; López, J. Javier; López Pintor, Darío (Elsevier, 2016-12-01)

An alternative procedure to predict both high-temperature stage and cool flames ignition delays under transient thermodynamic conditions is intended to be validated in this paper. An experimental study has been carried ...
Fuel sensitivity effects on dual-mode dual-fuel combustion operation for different octane numbers

García Martínez, Antonio; Monsalve-Serrano, Javier; Villalta-Lara, David; Lago-Sari, Rafael (Elsevier, 2019-12-01)

[EN] The dual-mode dual-fuel combustion is a promising combustion concept to achieve the required emissions and carbon dioxide reductions imposed by the next emissions standards. Nonetheless, since the combustion concept ...
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 ...
Optical study on characteristics of non-reacting and reacting diesel spray with different strategies of split injection

Desantes, J.M.; García-Oliver, José M; García Martínez, Antonio; Xuan, Tiemin (SAGE Publications, 2019-08)

[EN] Even though studies on split-injection strategies have been published in recent years, there are still many remaining questions about how the first injection affects the mixing and combustion processes of the second ...
Propiedades físico-químicas de diferentes especies para su uso en el análisis del proceso de autoencendido en un motor

Vega Asensio, Álvaro (Universitat Politècnica de València, 2017-07-20)

The study of combustion processes has taken special importance last years. Within these processes we find the autoignition phenomenom, the understanding of which is key in the development of more efficient and eco-friendly ...
Sensitivity analysis and validation of a predictive procedure for high and low-temperature ignition delays under engine conditions for n-dodecane using a Rapid Compression-Expansion Machine

Desantes, J.M.; Bermúdez, Vicente; López, J. Javier; López-Pintor, Darío (Elsevier, 2017-08-01)

[EN] A predictive procedure for cool flames and high-temperature ignition delays based on the accumulation and consumption of chain carriers has been validated for n-dodecane under engine conditions. To do so, an experimental ...
Study of ignition delay time and generalization of auto-ignition for PRFs in a RCEM by means of natural chemiluminescence

Desantes Fernández, José Mª; García Oliver, José María; Vera-Tudela-Fajardo, Walter Martin; López Pintor, Darío; Schneider, B.; Boulouchos, K. (Elsevier, 2016-03-01)

An investigation of the effects of contour conditions and fuel properties on ignition delay time under Homogeneous Charge Compression Ignition (HCCI) conditions is presented in this study. A parametric variation of initial ...
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 ...
Theoretical development of a new procedure to predict ignition delays under transient thermodynamic conditions and validation using a Rapid Compression-Expansion Machine

Desantes Fernández, José Mª; López, J. Javier; Molina, Santiago; López Pintor, Darío (Elsevier, 2016-01-15)

An experimental and theoretical study about the autoignition phenomenon has been performed in this article. A new procedure to predict ignition delays under transient (i.e. variable) thermodynamic conditions has been ...
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 ...