A5068628217- Advanced Combustion Engine Technologies
- Combustion and flame dynamics
- Fluid Dynamics and Heat Transfer
- Biodiesel Production and Applications
- Combustion and Detonation Processes
- Catalytic Processes in Materials Science
- Vehicle emissions and performance
- Fire dynamics and safety research
- Heat transfer and supercritical fluids
- Plant Surface Properties and Treatments
- Electrohydrodynamics and Fluid Dynamics
- Rocket and propulsion systems research
- Aerodynamics and Fluid Dynamics Research
- Engine and Fuel Emissions
- Probabilistic and Robust Engineering Design
- Radiative Heat Transfer Studies
- Agricultural and Food Production Studies
- Plant and soil sciences
- Thermochemical Biomass Conversion Processes
- Reinforcement Learning in Robotics
- Chemical Thermodynamics and Molecular Structure
- Spectroscopy and Laser Applications
- Aerosol Filtration and Electrostatic Precipitation
- Gaussian Processes and Bayesian Inference
- Engineering Applied Research
Universitat Politècnica de València
2015-2024
Sandia National Laboratories California
2022
University of Massachusetts Amherst
2022
Universitat Politècnica de Catalunya
2021
Barcelona Supercomputing Center
2021
Polytechnic University of Puerto Rico
2017-2019
The importance of new alternative fuels has assumed great relevance in the last decades to face issues global warming and pollutant emissions from energy production. scientific community is responsible for developing solutions achieve necessary environmental restriction policies. In this context, ammonia appears as a potential fuel candidate vector that may solve technological difficulties using hydrogen (H2) directly internal combustion engines. Its high content per unit mass, higher...
The two-colour method (2C) is a well-known methodology for the estimation of flame temperature and soot-related KL factor. A 2C imaging system has been built with single charge-coupled device (CCD) camera visualization diesel in single-cylinder 2-stroke engine optical accesses. work presented here focuses on methodological aspects. In that sense, influence calibration uncertainties measured factor analysed. Besides, theoretical study tries to link true soot distributions those derived from...
This and the accompanying article present an experimental study of diesel sprays under current direct-injected engine operating conditions. In this (Part I) is focused on flow behavior inside nozzle, characteristics injected into a high-density gas at low temperature so that fuel evaporation avoided. A complete characterization has been performed for five different nozzles, with nominal hole diameter ranging from 115 to 200 μm, in injection conditions, order evidence influence nozzle...
This work presents an implementation and evaluation of the Σ-Υ atomization model for Diesel spray CFD simulations. The is based on Eulerian representation dispersion by means a single-fluid variable density turbulent flow within RANS framework. locally homogeneous approach has been applied in order to develop vaporization state relationships. A finite-volume solver equations created using OpenFOAM open-source C++ library. Model predictions have compared experimental data from free sprays...
The present work reports a one-dimensional model to predict the liquid length and spray penetration of diesel sprays when using blends single-component fuels. A high-pressure liquid-vapour equilibrium has been implemented by means fugacity coefficients, together with hypothesis real-gas mixture calculate partial enthalpy each component. validated in first step an experimental study binary n-decane n-hexadecane, where temporal evolution vapor have measured. Results show that predicts...
<div class="section abstract"><div class="htmlview paragraph">In recent decades, the importance of emerging alternative fuels has increased significantly as a solution to problems global warming and air pollution from energy production. In this context, ammonia (NH<sub>3</sub>) is seen potential option vector that may be able overcome technical challenges associated with use other carbon-free such hydrogen (H<sub>2</sub>) in internal combustion engines...
A comparison between the Σ-Y atomization model and a classical DDM approach has been carried out for diesel spray computational fluid dynamics (CFD) simulations. The model, originally proposed by Vallet Borghi, is based on Eulerian representation of dispersion means single-fluid variable density turbulent flow. locally homogeneous flow applied to develop vaporization state relationships. finite-volume solver equations created using OpenFOAM CFD open-source C++ library. In case...
Significant efforts are under way to develop innovative ignition systems for spark-ignition engines used in transportation. Within this context, passive pre-chamber technology has emerged as a promising alternative passenger cars. However, several uncertainties remain regarding the operation of concept at low engine loads and speeds, well impact specific design features on combustion stability. Previous investigations have indicated that tangential angle holes can play vital role stabilizing...
An experimental study of fuel evaporation in diesel sprays under current direct-injection engines operating conditions is presented this article. Liquid spray penetration has been obtained by means backlight illumination images taken from a wide optical access engine reacting and nonreacting conditions. From these measurements, the dependence liquid maximum on injection ambient analyzed applying model hypothesis mixing limited vaporization, which verified results. A complete characterization...
A one-dimensional nonevaporative spray model has been extended to take into account the effects of evaporation under direct-injection diesel engine conditions. The approach is based on assumption that limited by mixing process between fuel and ambient gas, makes use nonideal gas state relationships for description whole spray. Experimental results have obtained means backlight illumination from a hot test rig. Comparisons experimental modeling confirm initial hypotheses. accurately predicts...