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    Wyświetlanie 1-3 z 3
    Tytuł:
    Numerical modelling of combustion process with the use of ANSYS FLUENT code
    Autorzy:
    Kowalski, M.
    Jankowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/245622.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    liquid fuels
    combustion processes
    turbulent flow
    combustion process model
    ANSYS FLUENT
    Opis:
    The article presents the modelling of the combustion process of liquid fuels using professional ANSYS FLUENT software. This program allows modelling the dynamics of compressible and incompressible, laminar and turbulent flows as well as heat exchange phenomena with occurrence and without chemical reactions. The model presented in the article takes into account the influence of the gas phase on the liquid phase during the fuel combustion process. The influence of velocity and pressure of the flowing gas and the type of flow has a significant impact on the combustion of liquid fuels. The developed model is fully reliable and the presented results are consistent with experimental research. The occurrence of a laminar sublayer in a turbulent flow was confirmed, and the thickness of this layer and the turbulent layer significantly influences the course of the combustion process. The use of the flat flow model reflects the basic phenomena occurring during the combustion of liquid fuels under turbulent conditions. The use of the program for flows with different flow velocity profiles is justified. It gives important information about the processes taking place during the combustion of liquid fuels. The results of numerical tests are presented graphically. The article presents graphs of velocity field, absolute pressure, power lines, temperature and density.
    Źródło:
    Journal of KONES; 2018, 25, 4; 175-186
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of co-disposal of sludge based on TTF-type precalciner on NOx emissions
    Autorzy:
    Liang, Ruru
    Yuan, Guanglei
    Liu, Renping
    Duan, Erhong
    Song, Jiale
    Powiązania:
    https://bibliotekanauki.pl/articles/27323978.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    nitric oxide
    cement production
    ANSYS FLUENT
    precalciner
    tlenek azotu
    produkcja cementu
    prekalcynator
    Opis:
    To reduce the emission of nitrogen oxides (NOx) during the co-disposal of sludge in a TTF-type precalciner, an optimized co-disposal process of a TTF-type precalciner has been implemented in a cement plant in Hebei. The model was built using ANSYS FLUENT software. The effects of three single-factor perspectives (sludge input ratio, gas flow rate, and tertiary air temperature on NO concentration) were investigated. The response surface method of Box–Behnken design was used. When the sludge ratio increased from 0 to 25%, the NO concentration at the outlet was 122–297 mg/m³. Meanwhile, it increased from 192 mg/ m³ to 241 mg/ m³ since the airflow increased from 95 m³/s to 122 m³/s. The maximum NO concentration was 192 mg/ m³ when the tertiary air temperature was 1170 K. The inter-action between airflow and sludge ratio was more significant than any other interaction between other conditions (P < 0.05). Finally, the optimum conditions were a sludge ratio of 5%, airflow 109 m³/s, and tertiary air temperature 1280 K. NO concentration was 166.9 mg/m³ under this condition.
    Źródło:
    Environment Protection Engineering; 2023, 49, 3; 53--68
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical analysis and optimization of a winglet sweep angle and winglet tip chord for improvement of aircraft flight performance
    Autorzy:
    Al-Khafaji, Ali J. Dawood
    Panatov, Gennady S.
    Boldyrev, Anton S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2096195.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    lift
    drag
    lift coefficient
    drag coefficient
    aircraft wing
    winglet
    angle of attack
    sweep angle
    SOLIDWORKS
    CFD
    ANSYS FLUENT
    współczynnik siły nośnej
    współczynnik oporu
    skrzydło samolotu
    skrzydełko aerodynamiczne
    kąt natarcia
    SolidWorks
    ANSYS Fluent
    Opis:
    In this paper, a study of the effect of winglet sweep angle and winglet tip chord of the aircraft wing on the aerodynamics performances and how to improve it are carried out, assuming Cant angle 60°, winglet height = 3.5 m, Toe angle = -5°, and Twist angle = +5°. Different sweep angles tested (-25°, -15°, 0°, +15°, +25°, +35°, and +45°) and winglet tip chord (0.25, 0.375, and 0.5 m). Four Angle of attack is presented (0°, 3°, 6°, and 9°). The aerodynamics properties of the wing were measured in terms of calculated lift to drag ratio to decide which wing has a high value of lift and lower drag. All models of a wing (eighty-four models) are drawn for 3D using the SOLIDWORKS program. Boeing 737-800 wing dimensions were used. All models of a wing were analyzed using ANSYS FLUENT. The results showed that sweep angle and winglet tip chord of the winglet by changing their configuration can improve aerodynamic performance for various attack angles. The maximum value of the lift to drag ratio was obtained with a sweep angle -15°, winglet tip chord 0.375m, and angle of attack 3°.
    Źródło:
    Diagnostyka; 2022, 23, 2; art. no. 2022210
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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