Acta Polytechnica. 2017, vol. 57, no. 1

 

Zobrazují se záznamy 1-9 z 9

    • PRELIMINARY STUDY ON COMBUSTION AND OVERALL PARAMETERS OF SYNGAS FUEL MIXTURES FOR SPARK IGNITION COMBUSTION ENGINE 

      Autor: Toman , Rastislav; Polóni , Marián; Chríbik , Andrej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      This paper presents a numerical study on a group of alternative gaseous fuels – syngases, and their use in the spark-ignition internal combustion engine Lombardini LGW 702. These syngas fuel mixtures consist mainly of ...

    • JET ENGINE INLET DISTORTION SCREEN AND DESCRIPTOR EVALUATION 

      Autor: Pečinka , Jiří; Bugajski Thomas, Gabriel; Kmoch , Petr; Jílek , Adolf
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Total pressure distortion is one of the three basic flow distortions (total pressure, total temperature and swirl distortion) that might appear at the inlet of a gas turbine engine (GTE) during operation. Different numerical ...

    • NUMERICAL MODELLING OF THE SOIL BEHAVIOUR BY USING NEWLY DEVELOPED ADVANCED MATERIAL MODEL 

      Autor: Veselý , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      This paper describes a theoretical background, implementation and validation of the newly developed Jardine plastic hardening-softening model (JPHS model), which can be used for numerical modelling of the soils behaviour. ...

    • TEARING MODES GROWTH RATE AMPLIFICATION DUE TO FINITE CURRENT RELAXATION 

      Autor: Mendonça da Silveira , Francisco Eugenio
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      In this work, we explore the influence of perturbative wavelengths, shorter than those usually considered, on the growth rate γ of the tearing modes. Thus, we adopt an extended form of Ohm’s law, which includes a finite ...

    • CALCULATIONS OF ION TRAJECTORIES AT MAGNETOPLASMA SEPARATION AND EXPERIMENTS WITH POLYATOMIC GASES 

      Autor: Yuferov , Vladimir; Shariy , Sergey; Tkachova , Tetiana; Katrechko , Vyacheslav; Svichkar , Alexander; Ilichova , Vira; Shvets , Mykhailo; Mufel , Evgen
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Calculated trajectories of ions with different masses, indicating the possibility of a mixture separation, are obtained. Comparative experiments for plasma of monatomic and polyatomic gases (Ar, N2, CO2), upon combination ...

    • PROPERTIES AND MICROSTRUCTURE OF CEMENT PASTE INCLUDING RECYCLED CONCRETE POWDER 

      Autor: Topič , Jaroslav; Prošek , Zdenek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The disposal and further recycling of concrete is being investigated worldwide, because the issue of complete recycling has not yet been fully resolved. A fundamental difficulty faced by researchers is the reuse of the ...

    • AN AIRPLANE WITH UNCONVENTIONALLY PLACED PROPELLER POWER UNIT 

      Autor: Červinka , Jan; Kulhánek , Robert; Pátek , Zdeněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The significance of the influence of operating propellers on the aircraft aerodynamic characteristics is well-known. Wind tunnel testing of an airplane model with operating propellers is a complex task regarding the required ...

    • DEFORMATION RESPONSE OF GELLAN GUM BASED BONE SCAFFOLD SUBJECTED TO UNIAXIAL QUASI-STATIC LOADING 

      Autor: Kytyr , Daniel; Krčmářová , Nela; Šleichrt , Jan; Fíla , Tomáš; Koudelka , Petr; Gantar , Ana; Novak , Sasa
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      This study is focuses on an investigation of the reinforcement effect of the bioactive glass nano-particles in the gellan gum (GG) scaffolds used in bone tissue engineering. The investigated material was synthesized as the ...

    • DETERMINATION OF WATER CONTENT IN PYROLYTIC TARS USING COULOMETRIC KARL-FISHER TITRATION 

      Autor: Jílková , Lenka; Hlinčík , Tomáš; Ciahotný , Karel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The liquid organic fraction of pyrolytic tar has a high energy value which makes possible its utilization as an energy source. However, before utilization, it is crucial to remove water from the liquid fraction. The presence ...