Výsledky vyhledávání

0567583 - FZÚ 2023 RIV CZ eng Z - Poloprovoz, ověřená technologie, odrůda/plemeno
Ackemann, M. - Šafka, J. - Véle, F. - Zulic, Sanin - Krátký, T.
The technology of additively manufactured advanced surfaces for pump blades with subsequent LSP treatment.
Interní kód: 21/HiLASE 2022 ; 2022
Technické parametry: Installation of additively manufactured blades to the pump unit and verification of its performance in real conditions. Evaluation of pump characteristics with regard to the newly added blades. Following the 3D print and LSP treatment, the blades were CNC machined to it is the final hydraulic shape and installed in the pump. To ensure a valid comparison with the previously tested (CNC machined and LSPed) blades, the configuration of the testing was exactly the same as in 2020. I.e. closed circuit with a pressure vessel. The pump was then extensively tested for hydraulic and operational characteristics and long-term resistance to intensive cavitation regimes.
Ekonomické parametry: LSP surface treatment enables improvement of the Additive Manufacturing technology so it can be used for the production of critical parts and it can be used in the most demanding industries such as power generation, biomedical, etc. The advantages of the above-described process can be summarised in the following points: • Effectivity of the process from the energetic, financial and material points of view. • Possibility to produce individual geometries within one manufacturing cycle. • Additive manufacturing enables the use of special features such as a hollow inner core which may be filled with a lightweight structure. The surface of the blade can be defined to contain special elements enhancing the flow parameters of the liquid.
Grant CEP: GA TA ČR TN01000038
Institucionální podpora: RVO:68378271
Klíčová slova: SLM * LSP * blades * cavitation
Obor OECD: Optics (including laser optics and quantum optics)
Trvalý link: https://hdl.handle.net/11104/0339887

0549725 - ÚT 2022 RIV PL eng A - Abstrakt
Šnábl, Pavel - Pešek, Luděk - Prasad, Chandra Shekhar
Time-variable normal contact force influence on dry-friction damping of self-excited vibration of bladed turbine wheel.
16th Dynamical systems theory and applications. Lodz: Lodz University of Technology, 2021 - (Awrejcewicz, J.; Kazmierczak, M.; Mrozowski, J.; Olejnik, P.). s. 708-708. ISBN 978-83-66741-20-1.
[Dynamical systems - Theory and Applications /16./. 06.12.2021-09.12.2021, on-line]
Grant CEP: GA ČR(CZ) GA20-26779S
Institucionální podpora: RVO:61388998
Klíčová slova: turbine blades * dry-friction contact * flutter * travelling wave * Van der Pol model
Obor OECD: Applied mechanics
http://repozytorium.p.lodz.pl/handle/11652/4116
Trvalý link: http://hdl.handle.net/11104/0327437

0507377 - ÚT 2020 RIV PL eng C - Konferenční příspěvek (zahraniční konf.)
Pešek, Luděk - Půst, Ladislav - Šnábl, Pavel
Study of dry-friction damping effect on two simplified models of flutter oscillations.
Advances in Mechanism and Machine Science. Krakow: Springer Nature Switzerland, 2019 - (Uhl, T.), s. 3419-3428, č. článku 00730337. 73. ISBN 978-3-030-20130-2. ISSN 2211-0984. E-ISSN 2211-0992.
[IFTOMM /15./. Krakow (PL), 30.06.2019-04.07.2019]
Grant CEP: GA ČR(CZ) GC19-02288J
Institucionální podpora: RVO:61388998
Klíčová slova: flutter oscillations of turbine blades * dry friction * damping of vibration * modes * nodal diameters
Obor OECD: Applied mechanics
Trvalý link: http://hdl.handle.net/11104/0303688

0495845 - ÚT 2019 RIV CZ eng A - Abstrakt
Půst, Ladislav - Pešek, Luděk - Šnábl, Pavel
Damping of flutter oscillations by dry friction contacts.
Computational Mechanics 2018 - Book of extended abstracts. Plzeň: University of West Bohemia, Plzeň, 2018 - (Adámek, V.; Jonášová, A.). s. 85-86. ISBN 978-80-261-0819-1.
[Computational Mechanics 2018 /34./. 31.10.2018-02.11.2018, Srní]
Grant CEP: GA ČR GA16-04546S
Institucionální podpora: RVO:61388998
Klíčová slova: flutter oscillations of turbine blades * dry friction * damping of vibration * modes * nodal diameters
Obor OECD: Applied mechanics
Trvalý link: http://hdl.handle.net/11104/0289918

0487853 - ÚT 2019 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Půst, Ladislav - Pešek, Luděk
Running flutter waves in the model of turbine blades cascade.
DYMAMESI 2018 - Proceedings. Prague: Institute of Thermomechanics AS CR, v. v. i., 2018 - (Zolotarev, I.; Pešek, L.; Kozieň, M.), s. 61-64. ISBN 978-80-87012-66-6.
[DYMAMESI 2018 - Dynamics of Machines and Mechanical Systems with Interactions. Prague (CZ), 06.03.2018-07.03.2018]
Grant CEP: GA ČR GA16-04546S
Institucionální podpora: RVO:61388998
Klíčová slova: blades cascade * flutter * running waves * self-excitation * number of blades
Obor OECD: Applied mechanics
Trvalý link: http://hdl.handle.net/11104/0286762