Enviaments recents

  • Three dimensional analysis of ahmed body aerodynamic performance enhancement using steady suction and blowing flow control techniques 

    Prakash, Bhanu; Bergadà Granyó, Josep Maria; Mellibovsky Elstein, Fernando (2018)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Aerodynamic drag reduction plays a vital role in the reduction of automobiles fuel consumption. Boundary layer physics and its intricate mechanisms that result in flow separation are to be understood and manipulated using ...
  • Three dimensional structures of flow through a square cylinder with an upstream splitter plate and for several velo city ratios 

    El Mansy, Reda; Sarwar, Wasim; Rodríguez Pérez, Ivette María; Bergadà Granyó, Josep Maria (2018)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In the present paper, three-dimensional Fluid structures and wake characteristics are evaluated for a square cylinder with an upstream splitter plate. The splitter plate divides the incoming flow in two streams, the ...
  • On the boundary layer development and heat transfer from a sphere at moderate Reynolds numbers 

    Rodríguez Pérez, Ivette María; Lehmkuhl, Oriol; Soria Guerrero, Manel; Gómez, Samuel; Domínguez Pumar, Manuel; Kowalski, Lukasz (2018)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Direct and large-eddy numerical simulations have been performed for a heated sphere at Reynolds numbers 200, 300, 500, 750, 1000 and 104, in the context of the development of a spherical wind sensor for Mars atmosphere ...
  • Boundary layer flow control using synthetic jets on the flow over a NACA 0012 airfoil 

    Duran, David; Rodríguez Pérez, Ivette María; Soria Guerrero, Manel; Lehmkuhl, Oriol (2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Numerical simulations of the flow control using a synthetic jet are presented. The flow considered is around a NACA 0012 airfoil at Re = 5000 and the actuator is located at 6% of the chord from the leading edge. This work ...
  • System analysis and test-bed for an atmosphere-breathing electric propulsion system using an inductive plasma thruster 

    Romano, Francesco; Binder, Tilman; Herdrichd, Georg H.; Roberts, Peter C.E; Rodríguez Donaire, Silvia; García-Almiñana, Daniel (2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Challenging space mission scenarios include those in very low Earth orbits, where the atmosphere creates significant drag to the S/C and forces their orbit to an early decay. For drag compensation, propulsion systems are ...
  • DISCOVERER - Radical Redesign of Earth Observation Satellites for Sustained Operation at Significantly Low Altitudes 

    Roberts, Peter C.E; Crisp, Nicholas H.; Edmonson, Steve; García-Almiñana, Daniel; Rodríguez Donaire, Silvia (2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    DISCOVERER is a new 5.7 million Euro, 4.25 year Horizon 2020 funded project which aims to radically redesign Earth observation satellites for sustained operation at significantly lower altitudes. The satellite based Earth ...
  • Performance Evaluation of a Novel Inductive Atmosphere-Breathing EP System 

    Romano, Francesco; Herdrichd, Georg H.; Fasoulas, Stefanos; García-Almiñana, Daniel; Rodríguez Donaire, Silvia (2017)
    Comunicació de congrés
    Accés obert
    Challenging space mission scenarios include those in low altitude orbits, where the atmosphere creates significant drag to the S/C and forces their orbit to an early decay. An atmosphere-breathing electric propulsion system ...
  • Numerical simulation of turbulence at lower costs: regularization modeling 

    Trias Miquel, Francesc Xavier; Gorobets, Andrei; Soria Guerrero, Manel; Oliva Llena, Asensio (2011)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    This work is devoted to the development of efficient methods for the numerical simulation of incompressible flows on modern supercomputers. Direct simulation of the Navier-Stokes equations is nowadays an essential tool ...
  • Coupling CFD models of airflow with building simulation with an object-oriented and parallel infrastructure 

    Damle, Rashmin; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Integrating CFD & HT models with the general building program raises the computational time of building simulations as these simulations are usually performed over a period of one year. Within this context, our aim is ...
  • Coherent structures in a flow past a circular cylinder at critical and super-critical Reynolds numbers 

    Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Chiva Segura, Jorge; Borrell Pol, Ricard; Oliva Llena, Asensio (Springer, 2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    It is well known that the wake topology in the flow past a circular cylinder remains almost unchanged up to Reynolds number ~105 Williamson (Annu Rev Fluid Mech 28(1), 477–539 (1996)) [1]. Then, at Re~2×105 major changes ...
  • Parametric analysis of active flow control using steady suction and steady blowing 

    Prakash, Bhanu; Mellibovsky Elstein, Fernando; Bergadà Granyó, Josep Maria (2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Active Flow Control is implemented over NACA 2412 airfoil using Steady Suctionand Steady Blowing techniques. The pre-stall angle of attack (AOA) 12 0 is studied at a high Reynolds number (Re chord ) of 3.1*10 6 for ...
  • NACA 2412 performance modification via using AFC 

    Summ, Thorsten; Prakash, Bhanu; Bergadà Granyó, Josep Maria; Wierschem, Andreas; Mellibovsky Elstein, Fernando (2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The NACA 2412 profile was numerically studied via employing 2D-DNS and implementing Active Flow Control (AFC), the Reynolds number considered was 6757, being the angle of attack of 8º. Initially, the basic flow without ...

Mostra'n més