Przeglądaj wg Autor "Obidowski, Damian"
Teraz wyświetlane 1 - 3 z 3
Wyników na stronę
Opcje sortowania
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, KrzysztofThe 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.Pozycja Mechanicy i chemicy wspólnie dla ochrony środowiska(Wydawnictwo Politechniki Łódzkiej, 2020) Obidowski, Damian; Fligel, AnnaNaukowcy z Instytutu Maszyn Przepływowych, Instytutu Inżynierii Materiałowej oraz z Instytutu Chemii Ogólnej i Ekologicznej pracują nad prototypem urządzenia do bezpiecznego przetwarzania pojemników po aerozolach. Badania są prowadzone w ramach projektu ECO-AEROZOL pozyskanego z NCBiR przez firmę CSD-ECO Sp. z o. o.Pozycja Radial fan controlled with impeller movable blades - CFD investigations(Wydawnictwo IMP PAN, 2016) Jóźwik, Krzysztof; Papierski, Adam; Sobczak, Krzysztof; Obidowski, Damian; Kryłłowicz, Władysław; Marciniak, Emil; Wróbel, Grzegorz; Marciniak, Adrian; Wróblewski, Piotr; Kobierska, Agnieszka; Frącczak, Łukasz; Podsędkowski, LeszekModern classical power generation systems, based on power plants in Poland, where coal (hard bituminous coal or lignite) is the primary energy source, operate under variable loading conditions. Thus, all machines working in the technological system of the power generation unit are required to be adapted to variable loading, and, consequently, to operate beyond the design point of their performance characteristics. High efficiency of the process requires the efficiency of individual devices to be high, beyond the design point, as well. For both air and exhaust gases fans, an effective control system is needed to attain a high level of efficiency. As a result of cooperation between two institutes from the Faculty of Mechanical Engineering, Lodz University of Technology, and the Vibroson company, a new design of the radial fan with impeller movable blades, which allows for controlling the device operation within a wide range, has been developed. This new design and determination the performance characteristics for two geometrical variants of blades with computational fluid dynamics methods are presented. The obtained results have been compared to the results of the measurements of fan performance curves conducted on the test stand.