Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Grzegorz Liśkiewicz"'
Publikováno v:
Energies, Vol 16, Iss 21, p 7452 (2023)
The flow and heat transfer induced by an exponentially shrinking sheet with hybrid nanoparticles are investigated comprehensively in this paper. Nanoparticles are considered due to their unusual characteristics such as extraordinary thermal conductiv
Externí odkaz:
https://doaj.org/article/9ea333234c5445128bbe250b3c2946b0
Publikováno v:
Energies, Vol 15, Iss 15, p 5625 (2022)
In this paper, a thorough 2D unsteady computational fluid dynamic analysis was performed on a pitching airfoil to properly comprehend the dynamic stall and aerodynamic forces. The computational software ANSYS Fluent was used to solve the unsteady Rey
Externí odkaz:
https://doaj.org/article/e003b9bd28b44f228d234de5bed84d6f
Publikováno v:
Sensors, Vol 22, Iss 5, p 2063 (2022)
Aerodynamic instabilities in centrifugal compressors are dangerous phenomena affecting machine efficiency and in severe cases leading to failure of the compressing system. Quick and robust instability detection during compressor operation is a challe
Externí odkaz:
https://doaj.org/article/c873565dc894441b84f0c57d12a8af63
Autor:
Kirill Kabalyk, Andrzej Jaeschke, Grzegorz Liśkiewicz, Michał Kulak, Tomasz Szydłowski, Robert Pietruszewski
Publikováno v:
Energies, Vol 14, Iss 14, p 4292 (2021)
The article describes an assessment of possible changes in constant fatigue life of a medium flow-coefficient centrifugal compressor impeller subject to operation at close-to-surge point. Some aspects of duct acoustics are additionally analyzed. The
Externí odkaz:
https://doaj.org/article/d12f558efdae44f29a8d5fa47729a21c
Autor:
Filip Grapow, Grzegorz Liśkiewicz
Publikováno v:
Energies, Vol 13, Iss 22, p 6072 (2020)
In this paper, the Greitzer surge model was systematically analysed with the model compressor duct length Lc as the tuning parameter. The surge phenomenon is known to induce a serious risk to centrifugal compressor operation. The two-dimensional Grei
Externí odkaz:
https://doaj.org/article/fcf28a4ee3374b9ca7adf733eea313bf
Autor:
Andrzej Jaeschke, Grzegorz Liśkiewicz
Publikováno v:
Energies, Vol 13, Iss 19, p 5111 (2020)
Centrifugal compressors are key elements of energy systems and industrial installations including fluid flow. Their operating range is strictly limited by the surge phenomenon. The Greitzer model is a known way of simulating the compressor’s behavi
Externí odkaz:
https://doaj.org/article/c2dbf9bd4553450eaeeb51b1852c7fb6
Autor:
Grzegorz Liśkiewicz, Kirill Kabalyk, Andrzej Jaeschke, Filip Grapow, Michał Kulak, Mateusz Stajuda, Władysław Kryłłowicz
Publikováno v:
Energies, Vol 13, Iss 16, p 4146 (2020)
Unstable flow structures cause inevitable energy losses in all power energy systems, including turbomachines. In this study, a set of analyses was conducted with the use of spectral maps on the pressure signals obtained from an industrial centrifugal
Externí odkaz:
https://doaj.org/article/a9706adf4fb5458f9d78ecd631e1e95c
Publikováno v:
Energies; Volume 15; Issue 15; Pages: 5625
In this paper, a thorough 2D unsteady computational fluid dynamic analysis was performed on a pitching airfoil to properly comprehend the dynamic stall and aerodynamic forces. The computational software ANSYS Fluent was used to solve the unsteady Rey
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd965512201c669d91168220df47df1b
Publikováno v:
Stajuda, M, Garcia Cava, D & Liskiewicz, G 2022, ' Aerodynamic instabilities detection via empirical mode decomposition in centrifugal compressors ', Measurement: Journal of the International Measurement Confederation, vol. 199, 111496 . https://doi.org/10.1016/j.measurement.2022.111496
Detection of aerodynamic instabilities in compressors is of great importance for machine safety and efficiency. It is a challenge due to their highly non-stationary and non-linear character. In this study, a method of instability detection in centrif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50f0f9896245e4f5516926bc5dadc91e
https://hdl.handle.net/20.500.11820/9d9f3d7c-e7d5-4b75-bb32-c93d317ddfc8
https://hdl.handle.net/20.500.11820/9d9f3d7c-e7d5-4b75-bb32-c93d317ddfc8
Publikováno v:
Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery.
This paper presents the universal method of assessing the Vaneless Diffuser Rotating Stall (VDRS) cells’ size with the use of the Particle Image Velocimetry (PIV) technique. Two different cell dimensions’ definitions were introduced: Radial Cell
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::749948af2a472644eb554c0cb3715f64
https://doi.org/10.1115/gt2022-83036
https://doi.org/10.1115/gt2022-83036