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    Wyświetlanie 1-3 z 3
    Tytuł:
    Computational Fluid Dynamic study on the wind characteristics of a multifunctional building system model in developed coastal cities
    Autorzy:
    Gerigk, Mateusz
    Jachowski, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/135259.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    architectural design
    Computational Fluid Dynamic (CFD)
    multifunctional building
    system model
    optimization
    sustainable environment
    Opis:
    This paper presents an approach for providing innovative technology by applying fluid mechanics to the field of architectural design. The aim is to make a building’s shape profitable and strengthen environmental protection by using the wind force to create an integrated wind absorption definition for a multifunctional building system model. Furthermore, taking control of the wind flow over an object can have an impact on not only the designed object itself but also on its surroundings. In modern coastal cities there are issues associated with the wind and ventilation that need to be solved. The presented system model and the calculations conducted are part of the new definition of a multifunctional object and the wind force as a significant subsystem. Systematizing this scope can be useful in design practice.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 60 (132); 27-33
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the aerodynamic drag of pneumatic life rafts as a factor for increasing the reliability of rescue operations
    Autorzy:
    Jachowski, Jacek
    Książkiewicz, Edyta
    Szwoch, Izabela
    Powiązania:
    https://bibliotekanauki.pl/articles/1955588.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    life raft
    simulation of drag force
    leeway
    computational fluid dynamics CFD
    Opis:
    Ensuring the safety of ship crews at sea is of the utmost importance. Life rafts are one of the basic components of any seagoing vessel and ensuring their stability is an important component of maritime research. This study concerns the determination of the aerodynamic drag coefficients of pneumatic life rafts in a full range of wind speed and directions. The drag coefficients are based on full-scale experimental studies and numerical calculations (computational fluid dynamics) carried out with Flow-3D software. Two types of life rafts are analysed in the numerical simulations, namely, a non-deformed raft and a raft deformed under the influence of wind pressure at a given flow velocity. The shape of the deformed pneumatic life raft is recreated on the basis of photographic documentation from experimental studies. The results of the numerical calculations are verified on the basis of full-scale flow experiments carried out at the Low Speed Wind Tunnel T-3 Laboratory at the Institute of Aviation in Warsaw. This study shows that there is a dependence of aerodynamic drag on the degree of deformation of the above-water part of the life raft, as well as the angle of the raft setting to the wind. In real water conditions, this angle depends mainly on the anchor point of the drift anchor and therefore should be considered at the design stage, which will directly reduce the wind leeway of the raft.
    Źródło:
    Polish Maritime Research; 2021, 3; 128-136
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parametric study on the flow field generated by river barge bow steering systems
    Autorzy:
    Abramowicz-Gerigk, Teresa
    Burciu, Zbigniew
    Jachowski, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/135334.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    Magnus effect
    bow rotor steering system
    river barge
    flow field
    CFD
    Opis:
    Low controllability under strong winds presents a problem for the operation of inland vessels, which can be improved using passive bow rudders and transverse thrusters. Bow thrusters can sufficiently improve the manoeuvrability at low speeds, but an unsolved problem is course maintaining and yaw checking of a vessel at medium and high speeds. This paper proposes the use of a bow steering system in which the bow rotors generate a Magnus force. The first physical test model of the system showed promising results and that much more research must be performed before this system can be used in industrial applications. The paper presents the results of a numerical study on the flow field generated by bow rotors. The first stage of a ship’s turn using the bow rotors was used to determine the dependence of the expected steering force on the inflow velocity and rotational speed of the rotors. The influence of the flow generated by the bow steering system on river banks and quay walls during manoeuvres was also discussed.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 60 (132); 9-17
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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