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Listar por palabra clave "Nozzle flow"

Mostrando ítems 1-9 de 9

A CFD STUDY OF CAVITATION IN REAL SIZE DIESEL INJECTORS

Patouna, Stavroula (Universitat Politècnica de València, 2012-02-17)

In Diesel engines, the internal flow characteristics in the fuel injection nozzles, such as the turbulence level and distribution, the cavitation pattern and the velocity profile affect significantly the air-fuel mixture ...
DEVELOPMENT OF A COMPUTATIONAL MODEL FOR A SIMULTANEOUS SIMULATION OF INTERNAL FLOW AND SPRAY BREAK-UP OF THE DIESEL INJECTION PROCESS

Martí Gómez-Aldaraví, Pedro (Universitat Politècnica de València, 2014-10-30)

El proceso de atomización desde una vena o lámina líquida hasta multitud de gotas dispersas en un medio gaseoso ha sido un fenómeno de interés desde hace varias décadas, especialmente en el campo de los motores de combustión ...
Flow regime effects over non-cavitating diesel injection nozzles

Payri, Raul; Salvador, F.J.; Gimeno, Jaime; García Martínez, Antonio (SAGE PUBLICATIONS LTD, 2012)

[EN] The research conducted and explained in this paper aims to explore and understand the influence of flow regime (laminar, transition or turbulent) inside diesel injector nozzles. For this purpose, an experimental study ...
High-speed X-Ray Phase Contrast Imaging of String Cavitation in a Diesel Injector Orifice Replica

Karathanassis, Ioannis; Koukouvinis, Phoevos; Lorenzi, Massimo; Kontolatis, Efstathios; Li, Zhilong; Wang, Jin; Mitroglou, N.; Gavaises, Manolis (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] The present investigation illustrates the temporally-resolved, phase-contrast visualization of the cavitating flow within an enlarged injector replica conducted at the ANL Advanced Photon Source. The flow was captured ...
Influence of biofuels on the internal flow in diesel injector nozzles

Salvador, F.J.; Martínez López, Jorge; Romero Bauset, José Vicente; Roselló, M.D. (Elsevier, 2011)

[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 ...
Study of the hydraulic characteristics of two injectors fed with different fuels in a GDI system

Payri, Raul; Gimeno, Jaime; Marti-Aldaravi, Pedro; Mendoza Alvarez, Victor (Elsevier, 2022-06-01)

[EN] In the latter years, the Gasoline Direct Injection systems (GDI) have been studied with the aim of providing a solution to the particulate matter emission issue. It has been proved that emission levels are reduced ...
Towards design optimization of high-pressure gasoline injectors using Genetic Algorithm coupled with Computational Fluid Dynamics (CFD)

Hellmann, Robin; Jochmann, Paul; Stapf, Karl Georg; Schuenemann, Erik; Daróczy, László; Thévenin, Dominique (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] The spray pattern of high-pressure multi-hole injectors as well as the atomization process are of uttermost importance regarding efficiency and emissions in gasoline combustion engines. Ensuring optimal homogenization ...
Transient nozzle flow analysis and near field characterization of gasoline direct fuel injector using Large Eddy Simulation

Payri, Raul; Gimeno, Jaime; Marti-Aldaravi, Pedro; Martínez, María (Elsevier, 2022-03)

[EN] Injection duration in spark ignition engines is typically very short. Thus, understanding transient effects of the Gasoline Direct injection (GDi) process plays a major role in the analysis of the mixture formation ...
Transient nozzle flow simulations of gasoline direct fuel injectors

Shahangian, Navid; Sharifian, Leila; Uehara, Kazuhiro; Noguchi, Yasushi; Martínez-García, María; Marti-Aldaravi, Pedro; Payri, Raul (Elsevier, 2020-07-05)

[EN] In the field of Internal Combustion Engines (ICE) the usage of Gasoline Direct fuel injectors (GDi) with gasoline, iso-octane, ethanol (or other alternative fuels) has gained relevance in the past years with the goal ...