[EN] Gasoline Direct Injection (GDI) systems have become a rapidly developing technology taking up a considerable
and rapidly growing share in the Gasoline Engine market due to the thermodynamic advantages of direct ...
Due to world trend on the emission regulations and greater demand of fuel economy, the research on advanced diesel injector designs is a key factor for the next generation diesel engines. For that reason, it is well ...
[EN] In this paper, the behavior of the internal nozzle flow of a standard diesel fuel has been compared against a biodiesel fuel (soybean oil) at cavitating and non-cavitating conditions, using a homogeneous equilibrium ...
[EN] Cavitation is a phenomenon affected considerably by the underlying pressure waves that occur on similar time
and length scales as the bubble dynamics. Thus appropriate representation of wave dynamics within ...
Pavía Alemany, F.; Rodríguez-Estrella, T.(Universitat Politècnica de València, 2018-04-27)
[EN] The influence of the negative pressures of Cavitation and Flashing phenomena in the formation of “scallops”, within karstic caves, is hereby studied. In this sense, the particular case of the Chorros Cave (Albacete, ...
Desantes Fernández, José Mª; Salvador Rubio, Francisco Javier; Carreres Talens, Marcos; Martínez López, Jorge(SAGE Publications (UK and US), 2015-03)
The cavitation phenomenon has a strong influence on the internal flow and spray development in diesel injector nozzles.
Despite its importance, there are many aspects which still remain unclear, especially for partial ...
Salvador, Francisco Javier; De La Morena, Joaquín; Carreres, M.; Jaramillo-Císcar, David(SAGE Publications, 2017)
[EN] The geometry of diesel injector nozzles is known to significantly affect the characteristic spray behavior and emissions formation. In this paper, a novel nozzle concept, consisting of orifices with a convergent-divergent ...
Margot , Xandra; Hoyas, S; Gil Megías, Antonio; Patouna, Stavroula(2012)
[EN] The objective of the present work is to investigate numerically the 3D flow within diesel injector-like geometries using a cavitation model implemented in a commercial CFD code. A comprehensive study of various numerical ...
Salvador Rubio, Francisco Javier; Hoyas, S; Novella Rosa, Ricardo; Martínez López, Jorge(Professional Engineering Publishing, 2011)
In this paper, the ability of a computational fluid dynamics code to reproduce cavitation phenomena accurately is checked by comparing data acquired by numerical simulations against those obtained from different experiments ...
Pirtac, Mihail(Universitat Politècnica de València, 2019-09-27)
[ES] Cyklone Tidal es una compañía alemana que actualmente desarrolla turbinas que aprovechan la energía mareomotriz. Para poder vender su producto, deben obtener una certificación de ingenieros del estado alemán. Este ...
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 ...
Salvador Rubio, Francisco Javier; Martínez López, Jorge Eugenio; Romero Bauset, José Vicente; Roselló Ferragud, María Dolores(Taylor & Francis, 2014)
In the present paper, a computational study has been performed in order to clarify the effects of the needle eccentricity in a real multihole microsac nozzle. This nozzle has been simulated at typical operating conditions ...
Salvador, F. J.; Martínez López, Jorge; Caballer Fernández, Miguel; Alfonso Laguna, Carlos de(Elsevier, 2013-02)
It is well known that cavitation phenomenon in diesel injector nozzles has a strong influence on the internal flow during the injection process and spray development. However, its influence on the flow during needle opening ...
Medina, M.; Bautista-Rodríguez, Abián; Wooldridge, M.; Payri, Raul(Elsevier, 2021-06-15)
[EN] High fuel injection pressure (>500 bar) in direct injection gasoline engines is an important means to reduce particulate emissions. While decades of fuel spray research has dramatically advanced the understanding ...
[EN] The ability to understand and manage the performance of hydraulic control valves is important in many automatic and manual industrial processes. The use of computational fluid dynamics (CFD) aids in the design of such ...
Salvador, Francisco Javier; Jaramillo-Císcar, David; Romero, José-Vicente; Roselló, María-Dolores(Elsevier, 2017)
[EN] In this paper, the behaviour of the internal nozzle flow and cavitation phenomenon are numerically studied for non-conventional Diesel convergent-divergent nozzles in order to assess their potential in terms of flow ...
[EN] Cavitation phase change phenomenon appears in many engineering applications, often eroding and damaging surfaces, so deteriorating the performance of devices. Therefore, it is a phenomenon of great interest for the ...
[EN] The paper describes the development in the OpenFOAM®
technology of a dynamic multiphase Volume-of-Fluid
(VoF) solver, supporting mesh handling with topological changes, that has been used for the study of the ...
Duke, Daniel J.; Matusik, Katarzyna E.; Kastengren, Alan L.; Swantek, Andrew B.; Sovis, Nicholas; Payri, Raul; Viera-Sotillo, Juan Pablo; Powell, Christopher F.(SAGE Publications, 2017)
[EN] Making quantitative measurements of the vapor distribution in a cavitating nozzle is difficult, owing to the strong scattering of visible light at gas-liquid boundaries and wall boundaries, and the small lengths and ...