Filipek, Roman
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Filipek, Roman Kazimierz
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inżynieria mechaniczna
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Item type:Doctoral Dissertation, Access status: Open Access , Zastosowanie MES do syntezy wibroakustycznych pól sprzężonych w układach o wymuszeniu impulsowym(Data obrony: 2013) Filipek, Roman
Wydział Inżynierii Mechanicznej i RobotykiIn the paper numerical sound synthesizer was developed for generating an acoustic signal with desired parameters at selected sound field points in a system excited by the impulse forcing. The resulting numerical synthesizer consists of two main blocks. The task of is to determine the first block sound source design parameters which allow to get the desired acoustic performance. The parameters taken into account first of all are the frequency components of the sound spectrum and the appropriate proportions between them. This is achieved by planning on the basis of DOE numerical experiment, obtaining system response surface (RS) and finding on it solution. The second block is designed to sound synthesis. For this purpose was developed a numerical model that describes the mechanical field, the sound field and the coupling between them. It allows the generation of an acoustic signal at any point of the field. The object of the application were three selected designs: Tibetan bowl, a bell and a sealed-box speaker. The synthesis included in dissertation is particularly interesting and useful in practice for the bells. It allows that even at the early stage of prototyping it is possible to choose appropriate design parameters, preview the generated sound and make approporiate adjustments in order to meet the needs of the recipient. This results in a better product without having to bear the cost of the real model manufacturing and testing.Item type:Article, Access status: Open Access , Bilans energetyczny agregatu kogeneracyjnego zasilanego gazem kopalnianym(Wydawnictwa AGH, 2024) Kalwar, Adam; Filipek, Roman; Madejski, Paweł; Pytel, Krzysztof; Kurdziel, FranciszekThis paper presents the results of a study of a gas engine heat recovery system in terms of efficient use of the energy contained in the fuel, with the study performed determining the most efficient variant of gas engine operation. A comparison between the manufacturer’s data and the performance results was also made. Simulations performed on the system model allowed the optimum engine load range to be determined. The results of the analyses also indicated which variant of the engine heat recovery system is the most effective.Item type:Article, Access status: Open Access , The energy balance of a CHP unit fuelled by mine gas(Wydawnictwa AGH, 2024) Kalwar, Adam; Filipek, Roman; Madejski, Paweł; Pytel, Krzysztof; Kurdziel, FranciszekThis paper presents the results of a study of a gas engine heat recovery system in terms of efficient use of the energy contained in the fuel, with the study performed determining the most efficient variant of gas engine operation. A comparison between the manufacturer’s data and the performance results was also made. Simulations performed on the system model allowed the optimum engine load range to be determined. The results of the analyses also indicated which variant of the engine heat recovery system is the most effective.