[EN] The present study gives a general outline for the fluid-dynamical calculation of flows at high pressure conditions. The main idea is to present a mathematical description of high pressure processes in liquids at ...
Payri, Raul; Gimeno, Jaime; Marti-Aldaravi, Pedro; Viera, Alberto(SAGE Publications, 2021-04)
[EN] As legislations set very stringent environmental and fuel economy standards, researchers have pushed into a continuous development in all areas of the diesel engine. The recent evolution of the injection technologies ...
[EN] In this paper, a methodology for Phase Doppler Anemometry (PDPA) measurements on a multi-hole diesel injector is developed. Several key considerations were taken into account in this methodology: The windows for PDPA ...
[ES] Los objetivos de este proyecto se puede resumir de la siguiente manera:
Utilización y optimización de la maqueta de fCdM en el estudio de la inyección.
Desarrollar un método para cuantificar la temperatura del chorro ...
Payri, Raul; Gimeno, Jaime; Marti-Aldaravi, Pedro; Alarcón-Herrera, Mary Yilbary(Springer-Verlag, 2017)
[EN] The injector dynamics have a strong impact on spray behavior, therefore on combustion efficiency and pollutant emissions. Nozzle flow and spray coupled simulations are useful tools to analyze the effect of nozzle ...
Modern engine design has challenging requirements towards maximum power output, fuel consumption and emissions. For engine combustion development programs, the injection system has to be able to operate reliable under a ...
[EN] Nearly all active fire extinguishing systems consist of injecting an agent into the space set on fire. For aircraft cargo cabins, the agent widely used up to date is Halon 1301. The FAA provides a level of safety for ...
García Vicente, Emilio(Universitat Politècnica de València, 2023-09-25)
[ES] Grupo Sopena es una empresa especializada en extrusión, lacado y anodizado de perfiles de aluminio. Esta empresa utiliza hornos de altas temperaturas y maquinaria eléctrica para llevar a cabo sus procesos, generando ...
Payri, Raul; Gimeno, Jaime; Mata, Carmen; Viera-Sotillo, Alberto Antonio(Elsevier, 2017-12-15)
[EN] As the regulations for pollutant emissions in diesel engines are increasingly restrictive, the introduction of the piezoelectric direct-acting injectors seeks to improve the overall efficiency of the injection system, ...
Payri, Raul; Bracho Leon, Gabriela; Gimeno, Jaime; Bautista-Rodríguez, Abián(Elsevier, 2018)
[EN] Awareness of climate change, fossil fuel availability, and pollutants has been growing which have pushed forward the effort in cleaner engines. In this aspect, the gasoline engines have more improving margin than ...
[EN] Air-transmitted pathogens have become of particular interest for the general population during the COVID pandemic. Coughing is one of the most important spreading vector for air transmitted pathogens. To prevent and ...
[EN] To continuously improve CFD models which simulate spray evolution, breakup and evaporation mechanisms, it is
helpful to validate them with results obtained by experimental research. In the present study, a mono-orifice ...
[EN] In this paper, a parametric study of the Stress Concentration Factor (SCF) has been carried out in cylindrical pressure vessels with circular holes. A three-dimensional finite element analysis has been carried out ...
Payri, Raul; Salvador Rubio, Francisco Javier; Gimeno, Jaime; Venegas Pereira, Óscar Hernando(Elsevier, 2013-01)
In this paper the behavior of the internal flow under cavitating conditions and the influence of using different fuels is studied. For this purpose, a transparent nozzle (quartz plate) with a cylindrical orifice and four ...
Payri, Raul; Gimeno, Jaime; Bracho Leon, Gabriela; Vaquerizo, Daniel(Elsevier, 2016-08-25)
A lot of effort has been put in the past years into the understanding of the delivery and development of diesel sprays in engine-like conditions as it has been proved to be a very important step for the design of better ...
Payri, Raul; Gimeno, Jaime; De La Morena, Joaquín; Battiston, Paul A.; Wadhwa, Arnrita; Straub, Robert(Elsevier, 2016-08-15)
A new prototype common rail injector featuring a complete new nozzle design concept was exhaustively characterized both from the hydraulic and spray formation point of view. A commercial injection rate meter together with ...