Torregrosa, A. J.; Broatch, A.; Margot, Xandra Marcelle; García Tíscar, Jorge; Narvekar, Y.; Cheung, R.(Elsevier, 2017)
[EN] This paper describes an experimental study carried out with the objective of characterizing flow instabilities in turbocharger compressors, specially the distribution of the high-temperature compressed back flow that ...
Torregrosa, A. J.; Broatch, A.; Pastor, José V.; GARCIA TISCAR, JORGE; Sharma, Raj K.; Cheung, R.(Elsevier, 2018-12)
[EN] An experimental measurement campaign is presented where particle image velocimetry (PIV) was used in an effort to characterize the velocity field in a turbocharger compressor when unstable operating conditions lead ...
García-Cuevas González, Luis Miguel; García Tíscar, Jorge; Bares Moreno, Pau; Gil Megías, Antonio; Quintero Igeño, Pedro Manuel(2022-08-02)
En este objeto de aprendizaje explicamos un procedimiento sencillo para caracterizar la pérdida de carga o el coeficiente de descarga de un espécimen como un agujero calibrado en un conducto unidimensional.
Centrifugal compressors working in the surge side of the map generate a broadband noise in the range of 1-3 kHz, named as whoosh noise. This noise is perceived at strongly downsized engines operating at particular conditions ...
[EN] In this paper, the unsteady behaviour of a compression-ignited (CI) engine combustion chamber is studied by analysing the results of a Computational Fluid Dynamics (CFD) model through the application of different flow ...
[EN] This work is focused on the numerical study of low-order coherent structures of a high-swirled laboratory-scaled combustor operated by a Lean Premixed (LP) injection system in non-reacting conditions through different ...
Centrifugal compressor aeroacoustics are analyzed by means of a three-dimensional CFD model. Three operating points at nominal compressor speed are simulated ranging from best efficiency point to near-surge conditions. ...
Chávez-Modena, Miguel; Valero, Eusebio; Miguel González,Leo; Broatch, A.; GARCIA TISCAR, JORGE; Felgueroso-Rodríguez, Andrés(Institute of Aeronautics and Astronautics, Inc., 2021-08-06)
[EN] A surface air-cooled oil cooler (SACOC) is a passive heat exchanger used to evacuate a large quantity of heat from the oil circuit of a turbofan engine to its secondary flow with minimal perturbation. Using the secondary ...
[EN] Altitude simulators for internal combustion engines are broadly used in order to simulate different atmospheric pressure and temperatures on a test bench. One of the main problems of these devices is their outlet ...
[EN] While the influence of inlet geometry on turbocharger compressor behaviour has usually been investigated in terms of performance, surge margin and efficiency, data is scarce regarding the impact of the inlet flow field ...
[EN] As the focus of research and development is put into innovative combustion concepts with the goal of reducing harmful chemical pollutants while keeping or even improving the efficiency of conventional Diesel combustion, ...
Bracho León, Gabriela Cristina; Martí-Aldaraví, Pedro; García Tíscar, Jorge; Gómez Soriano, Josep(Editorial Universitat Politècnica de València, 2022-01-19)
[EN] During the last year 2020, education in European universities has suffered a challenging transformation from an established pedagogical model to a digital one. The face-to-face formal lectures have been replaced to ...
de la Asunción Mollá, Salvador(Universitat Politècnica de València, 2021-07-29)
[ES] El rendimiento de los motores a reacción se ve muy afectado por las irregularidades del flujo de aire que entra en ellos. La distorsión de tipo swirl en el flujo será estudiada en este trabajo, y como simularla. ...
Ambrozkiewicz, Bartlomiej; Czyz, Zbigniew; Staczek, Pawel; Tiseira, Andrés-Omar; GARCIA TISCAR, JORGE(Lublin University of Technology, 2022-12-01)
[EN] This paper analyzes a piezoelectric system made of a smart lead zirconate material. The system is composed of a monolithic PZT (piezoelectric ceramic) plate made of a ceramic-based piezoelectric material. The experiment ...
[EN] This paper evaluates the potential advantages of introducing a new injector concept with a dual set of orifices in a 2-stroke engine operating with gasoline partially premixed combustion (PPC gasoline), specially in ...
Rodríguez Pastor, Marc(Universitat Politècnica de València, 2022-11-24)
[ES] La tecnología LDI se ha convertido en una de las opciones más prometedoras en combustores de inyección líquida para reducir las emisiones de NOx. En este tipo de turbinas de gas, el combustible se introduce directamente ...
Sanchez Gisbert, Maria(Universitat Politècnica de València, 2019-02-11)
[ES] El presente TrabajoFinal de Grado consistióen la adecuación de una instalación del Departamento de Motores y Máquinas Térmicas de la Universidad Politécnica de Valencia para realizar ensayos experimentalesde ...
Turbocharger noise has become a major concern in downsized automotive engine development. In this paper, the analysis is focused on the whoosh noise produced by the compressor when it is working near surge. A centrifugal ...
[EN] The main challenge of next-generation aeronautical gas turbine engines lies in the increase of the efficiency of the cycle and the reduction of pollutant emissions below stringent restrictions. This has led to the ...
[EN] New technologies are required to improve engine thermal efficiency.
For this it is necessary to use all the tools available nowadays, in
particular computational tools, which allow testing the viability of
different ...