Artykuły (WM)

Stały URI dla kolekcjihttp://hdl.handle.net/11652/206

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2013 - 20163

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  • Pozycja
    Numeryczna analiza przepływu przez turbinę Savoniusa.
    (Wydawnictwo Politechniki Łódzkiej. Instytut Maszyn Przepływowych, 2013) Kacprzak, Konrad; Sobczak, Krzysztof
    Przepływ wokół turbiny wiatrowej Savoniusa o stałym przekroju został przeanalizowany przy pomocy symulacji quasi-2D oraz 3D w programie ANSYS CFX. Symulacje przeprowadzono tak, aby możliwe było porównanie ich wyników z danymi eksperymentalnymi innych badaczy. Przeanalizowano dwa projekty turbin: turbinę Savoniusa oraz Bacha. Referat zawiera analizę najbardziej charakterystycznych struktur przepływu oraz ich porównanie.
  • Pozycja
    New Design Method for the Formed Suction Intake in Axial-Flow Pumps with a Vertical Axis.
    (Lodz University of Technology. Faculty of Mechanical Engineering. Department Division of Dynamics., 2016) Błaszczyk, Andrzej; Papierski, Adam; Susik, Mariusz
    A concept of the formed suction intake design obtained with an algorithm for vertical axial-flow pumps is presented. The design methodology is a part of works conducted within project no. N N513 460240 supported by the Polish National Science Center. The proposed procedure is used to optimize intakes. The results of steady flow numerical computations in the suction intake as well as applications of the design optimization in the aspect of fulfilling two objective functions are discussed. The objective functions given by the authors concern the optimal in flow of the fluid into the impeller.
  • Pozycja
    Development of a CFD model for propeller simulation.
    (Lodz University of Technology. Faculty of Mechanical Engineering. Department Division of Dynamics., 2016) Stajuda, Mateusz; Karczewski, Maciej; Obidowski, Damian; Jóźwik, Krzysztof
    The article presents a development of numerical model for a single propeller simulation and comparison of obtained results with experimental data available from a test campaign in scale 1:1. Described simulation is a steady state computation taking advantage of Multiple Reference Frame model implemented in Ansys CFX. The paper includes an analysis of rotating domain thickness influence on numerical values of thrust and power. The results indicate that this type of simulation may be sensitive to the sizing of rotating domain especially when disc solidity is low, or when the number of blades is 2, a frequent situation in all electric flight vehicles. The analysis shows that performing simulations, using one domain sizing, for a number of flight scenarios requiring analysis of a few rotational speeds can produce unintuitive results. Therefore, it is suggested to calibrate the model, preferably by experimental results.