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  • Fully nonlinear mode competition in magnetised Taylor-Couette flow 

    Ayats López, Roger; Deguchi, Kengo; Mellibovsky Elstein, Fernando; Meseguer Serrano, Álvaro (2020-08-25)
    Article
    Restricted access - publisher's policy
    We study the nonlinear mode competition of various spiral instabilities in magnetised Taylor-Couette flow. The resulting finite-amplitude mixed-mode solution branches are tracked using the annular-parallelogram periodic ...

  • Numerical characterization of a technically premixed hydrogen flame under conditions close to flashback 

    Mira Martínez, Daniel; Lehmkuhl, Oriol; Both, Ambrus; Stathopoulos, Panagiotis; Tanneberger, Tom; Reichel, Thoralf G.; Paschereit, Christian Oliver; Vázquez, Mariano; Houzeaux, Guillaume (Springer, 2020-03)
    Article
    Restricted access - publisher's policy
    This work presents a numerical study of a technically premixed swirling combustor with central air injection at conditions close to flashback using large-eddy simulation with flamelet modelling. This burner has the ...

  • Low-dissipation finite element strategy for low Mach number reacting flows 

    Both, Ambrus; Lehmkuhl, Oriol; Mira Martínez, Daniel; Ortega, Marc (Elsevier, 2020-03-30)
    Article
    Restricted access - publisher's policy
    The present paper extends the conservative finite element convective scheme proposed by Charnyi et al.(Journal of Computational Physics 337, 2017, 289–308) originally formulated for incompressible flows to the low Mach ...

  • Effects of turbulence-chemistry interactions on auto-ignition and flame structure for n-dodecane spray combustion 

    Zhang, Yan; Wang, Hu; Both, Ambrus; Ma, Likun; Yao, Mingfa (2019-06-01)
    Article
    Open Access
    The Engine Combustion Network (ECN) spray A under diesel engine conditions is investigated with a non-adiabatic 5D Flamelet Generated Manifolds (FGM) model with the consideration of detailed chemical kinetic mechanisms. ...

  • Multiple UAV systems: a survey 

    Skorobogatov, Georgy; Barrado Muxí, Cristina; Salamí San Juan, Esther (2020-04-02)
    Article
    Open Access
    Nowadays, Unmanned Aerial Vehicles (UAVs) are used in many different applications. Using systems of multiple UAVs is the next obvious step in the process of applying this technology for variety of tasks. There are few ...

  • EGNOS 1046 maritime service assessment 

    Ibáñez Segura, Deimos; Rovira Garcia, Adrià; Alonso Alonso, María Teresa; Sanz Subirana, Jaume; Juan Zornoza, José Miguel; González Casado, Guillermo; López Martínez, Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2020-01-01)
    Article
    Open Access
    The present contribution evaluates how the European Geostationary Navigation Overlay System (EGNOS) meets the International Maritime Organization (IMO) requirements established in its Resolution A.1046 for navigation in ...

  • Estimating fuel consumption from radar tracks: a validation exercise using FDR and radar tracks from descent trajectories 

    Dalmau Codina, Ramon; Prats Menéndez, Xavier; Ramonjoan Escobar, Alex; Soley, Santiago (Springer, 2020-02-19)
    Article
    Restricted access - publisher's policy
    Fuel consumption is one of the major considerations for both the impact of aviation in the environment and the cost of operations. This paper assesses the accuracy of a method capable of producing aircraft fuel estimates ...

  • A framework for collaborative air traffic flow management minimizing costs for airspace users: Enabling trajectory options and flexible pre-tactical delay management 

    Xu, Yan; Dalmau Codina, Ramon; Melgosa Farrés, Marc; Villardi de Montlaur, Adeline de; Prats Menéndez, Xavier (2020-03-03)
    Article
    Restricted access - publisher's policy
    This paper proposes a collaborative air traffic flow management (ATFM) framework, in the scope of trajectory based operations, aiming to improve the cost-efficiency for airspace users (AUs) when facing ATFM regulations. ...

  • Using Broadcast Wind Observations to Update the Optimal Descent Trajectory in Real-Time 

    Dalmau Codina, Ramon; Prats Menéndez, Xavier; Baxley, Brian (2020-02)
    Article
    Restricted access - publisher's policy
    The ability to meet a controlled time of arrival during a continuous descent operation will enable environmentally friendly and fuel-efficient descent operations while simultaneously maintaining airport throughput. However, ...

  • Measuring phase scintillation at different frequencies with conventional GNSS receivers operating at 1 Hz 

    Nguyen, Viet Khoi; Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Hai Tung, Ta; The Vinh, La (2019-10-01)
    Article
    Open Access
    Ionospheric scintillation causes rapid fluctuations of measurements from Global Navigation Satellite Systems (GNSSs), thus threatening space-based communication and geolocation services. The phenomenon is most intense in ...

  • Assessing the quality of ionospheric models through GNSS positioning error: methodology and results 

    Rovira Garcia, Adrià; Ibáñez Segura, Deimos; Orús Pérez, Raul; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo (2020-01-01)
    Article
    Open Access
    Single-frequency users of the global navigation satellite system (GNSS) must correct for the ionospheric delay. These corrections are available from global ionospheric models (GIMs). Therefore, the accuracy of the GIM is ...

  • Confirming geomagnetic Sfe by means of a solar flare detector based on GNSS 

    Curto Subirats, Juan Jose; Juan Zornoza, José Miguel; Timote Bejarano, Cristhian Camilo (2019-11-28)
    Article
    Open Access
    Solar Flares (SF) refer to sudden increases of electromagnetic radiation from the Sun lasting from minutes to hours. Irradiance in the Extremely Ultra-Violet (EUV) or X band is enhanced and it can produce a sudden ...

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