Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Daniel Himr"'
Autor:
Daniel HIMR
Publikováno v:
Transactions of the VŠB-Technical University of Ostrava, Mechanical Series, Vol 60, Iss 1, Pp 29-38 (2014)
The paper is focused on a numerical simulation of unsteady flow in a pipeline. The special attention is paid to a numerical model of an air valve, which has to include all possible regimes: critical/subcritical inflow and critical/subcritical outflow
Externí odkaz:
https://doaj.org/article/61bca2bc796b454c984416b116f5228f
Publikováno v:
IOP Conference Series: Earth and Environmental Science. 2021, vol. 774, issue 1, p. 012145-012145.
Fluid pulsations can significantly influence behavior of bearings or sealing parts of hydraulic machines and therefore their operation. In this contribution, an analytical approach to solve pressure pulsations dynamics is compared with a computationa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0ece75e5f21b4306d702ef951240557
https://hdl.handle.net/11012/200964
https://hdl.handle.net/11012/200964
Publikováno v:
Sustainability, Vol 13, Iss 7125, p 7125 (2021)
Sustainability. 2021, vol. 13, issue 13, p. 1-10.
Sustainability
Volume 13
Issue 13
Sustainability. 2021, vol. 13, issue 13, p. 1-10.
Sustainability
Volume 13
Issue 13
The operation of any hydraulic power plant is accompanied by pressure pulsations that are caused by vortex rope under the runner, rotor–stator interaction and various transitions during changes in operating conditions or start-ups and shut-downs. W
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c5441aa2534b0d464bcda5ae793a88b
https://www.mdpi.com/2071-1050/13/13/7125
https://www.mdpi.com/2071-1050/13/13/7125
Publikováno v:
EPJ Web of Conferences, Vol 213, p 02013 (2019)
EPJ Web of Conferences. 2019, vol. 213, issue 1, p. 1-8.
EPJ Web of Conferences. 2019, vol. 213, issue 1, p. 1-8.
The check valves play an important role in safety and reliability of many technologies using liquid or gas flow. Check valves are elements of the hydraulic system enabling the one-way flow without a significant pressure loss and preventing the revers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41abbcafae258801e4336ed6e2771999
https://www.epj-conferences.org/articles/epjconf/pdf/2019/18/epjconf_efm18_02013.pdf
https://www.epj-conferences.org/articles/epjconf/pdf/2019/18/epjconf_efm18_02013.pdf
Publikováno v:
Measurement Science Review, Vol 16, Iss 4, Pp 197-204 (2016)
Measurement Science Review. 2016, vol. 16, issue 4, p. 197-204.
Measurement Science Review. 2016, vol. 16, issue 4, p. 197-204.
Cavitation is a phenomenon with both positive and negative effects and with dynamic manifestations in hydraulic, food, chemical and other machinery. This article deals with the detection and dynamic behavior of cavitation clouds in water flows throug
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a49261df2a770f6f92d2d5ba15b0c27e
https://doi.org/10.1515/msr-2016-0024
https://doi.org/10.1515/msr-2016-0024
Publikováno v:
EPJ Web of Conferences. 2018, vol. 180, issue 2018, p. 1-5.
EPJ Web of Conferences, Vol 180, p 02035 (2018)
EPJ Web of Conferences, Vol 180, p 02035 (2018)
Additional eect of uid on the solid body is often ignored phenomenon. Although it is possible to do an analytic derivation of equations describing additional eects for many various conditions, it can be dicult to solve them. The paper shows pressure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2a366318c1ef6aaffcd53139e20c55f
https://hdl.handle.net/11012/84110
https://hdl.handle.net/11012/84110
Publikováno v:
EPJ Web of Conferences. 2018, vol. 180, issue 2018, p. 1-6.
EPJ Web of Conferences, Vol 180, p 02049 (2018)
EPJ Web of Conferences, Vol 180, p 02049 (2018)
Bulk viscosity is an important factor in the damping properties of fluid systems and exhibits frequency dependent behaviour. A comparison between modal analysis in ANSYS Acoustics, custom code and experimental data is presented in this paper. The mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee2d19686c13556ec9897451243fa9eb
https://hdl.handle.net/11012/85323
https://hdl.handle.net/11012/85323
Publikováno v:
EPJ Web of Conferences, Vol 143, p 02036 (2017)
EPJ Web of Conferences. 2017, vol. 114, issue 2016, p. 1-6.
EPJ Web of Conferences. 2017, vol. 114, issue 2016, p. 1-6.
Check valve in a pipeline is supposed to prevent the reverse flow and to allow the flow in the positive direction. The construction of check valves follows these requirements, but the check valve must not cause pressure pulsations in transients. It m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4d30c471c4184a5b16f629410b03a5b
https://doaj.org/article/00447426deef40ca9711ea70dd9f2217
https://doaj.org/article/00447426deef40ca9711ea70dd9f2217
Autor:
Vladimír Habán, Daniel Himr
Publikováno v:
Applied Mechanics and Materials. 630:375-382
A pumping station in a fuel storage suffered from pressure pulsations in a petrodiesel pipeline. Check valves protecting the station against back flow made a big noise when disc hit a seat. Due to employees complaints we were asked to solve the probl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9da61b8b22057e05f46eba7c712c6d59
https://doi.org/10.4028/www.scientific.net/amm.630.375
https://doi.org/10.4028/www.scientific.net/amm.630.375
Publikováno v:
IOP Conference Series: Earth and Environmental Science. 405:012012
An ideal check valve is supposed to have a zero pressure loss when the flow rate direction is positive and a negative flow rate is not possible. A real check valve has a low pressure loss and it is possible to suppress negative flow (especially when
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9ba69737deed5153b0953aada7e5be9
https://doi.org/10.1088/1755-1315/405/1/012012
https://doi.org/10.1088/1755-1315/405/1/012012