Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Jan Halama"'
Autor:
Marek Pátý, Jan Halama
Publikováno v:
Acta Polytechnica, Vol 61, Iss SI, Pp 135-147 (2021)
The endeavour to increase the power output of steam turbines results in the design of low-pressure stages with large diameters. Such designs, featuring long and thin blades, are increasingly susceptible to unfavourable aeroelastic effects. The intera
Externí odkaz:
https://doaj.org/article/dea424fcf16a4ee88ebfe05616902bad
Autor:
Ondrej Novak, Marek Bobcik, Martin Luxa, Jaroslav Fort, Bartolomej Rudas, Jaroslav Synac, David Simurda, Jiri Furst, Jan Halama, Vladimir Hric, Jaromir Prihoda, Zdenek Simka
Publikováno v:
International Journal of Turbomachinery, Propulsion and Power, Vol 4, Iss 4, p 33 (2019)
Recent trends in the electric energy market such as biomass, waste incineration or combined cycle power plants require innovative solutions in steam turbine design. Variable operating conditions cause significant changes in flow field surrounding the
Externí odkaz:
https://doaj.org/article/bcff54b24f774879b38f76451c0ee3cd
Autor:
Jan Halama
Publikováno v:
Acta Polytechnica, Vol 52, Iss 6 (2012)
The paper presents a numerical simulation of the transonic flow of steam with a non-equilibrium phase change. The flow of steam is approximated by a mixture model complemented by transport equations for moments. Proper formulation of the problem cons
Externí odkaz:
https://doaj.org/article/a561e231cc3e448c8942f03e38951200
Autor:
Jan Halama, Marek Pátý
Publikováno v:
Acta Polytechnica, Vol 61, Iss SI, Pp 135-147 (2021)
The endeavour to increase the power output of steam turbines results in the design of low-pressure stages with large diameters. Such designs, featuring long and thin blades, are increasingly susceptible to unfavourable aeroelastic effects. The intera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4edb192399c6725f6e5d6ac7878c351
https://doi.org/10.14311/ap.2021.61.0135
https://doi.org/10.14311/ap.2021.61.0135
Autor:
Jan Halama, Marek Pátý
Publikováno v:
ACC Journal. 25:39-57
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::410e79777e02eb2d66b47c66a9636dc0
https://doi.org/10.15240/tul/004/2019-1-004
https://doi.org/10.15240/tul/004/2019-1-004
Autor:
Vladimír Hric, Jan Halama
Publikováno v:
Advances in Computational Mathematics. 45:2147-2162
Recent benchmark test “International Wet Steam Modelling Project” promoted by Joerg Starzmann et al. (Proc. Inst. Mech. Eng. A: J. Power Energy 232, 550–570, 2018) pointed out limitations of current numerical simulations of non-equilibrium cond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6de2074f91dc1760213ca8cd04c044f3
https://doi.org/10.1007/s10444-019-09700-1
https://doi.org/10.1007/s10444-019-09700-1
Publikováno v:
Applied Mathematics and Computation. 319:499-509
Simulation of transonic flow of steam with phase changes represents rather complex problem. One has to consider several simplifications to obtain a flow model, which is computationally adequate. Typical current simulations are based on the solution o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6ed139c33a0d1f6f122cb9b9bd372d5
https://doi.org/10.1016/j.amc.2017.05.044
https://doi.org/10.1016/j.amc.2017.05.044
Publikováno v:
Applied Mathematics and Computation. 319:633-646
The paper deals with the numerical simulation of the flow field in a turbine cascade, which corresponds to the tip section of a last low-pressure steam turbine rotor. Considered cascade consists of very thin profiles with high stagger angle. The resu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e139c66d6065b85269d8b15d239944d
https://doi.org/10.1016/j.amc.2017.07.040
https://doi.org/10.1016/j.amc.2017.07.040
Publikováno v:
Journal of Computational and Applied Mathematics. 398:113653
This paper describes a pressure-based solver based on the finite volume approach for the simulation of high-speed wet steam flows with non-equilibrium condensation. The governing mathematical model consists of the system of Navier–Stokes equations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0d804830ab6007b755c04df5ce74edc
https://doi.org/10.1016/j.cam.2021.113653
https://doi.org/10.1016/j.cam.2021.113653
Autor:
Jan Halama, Sergej Chodarev
Publikováno v:
2019 IEEE 15th International Scientific Conference on Informatics.
YAJCo is a language development tool where the language is defined using a metamodel in the form of annotated Java classes. YAJCo can generate various tools for a defined language, including parser and pretty-printer. The goal of this work was to aut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::695eef6064481016ea4608f0f95db82e
https://doi.org/10.1109/informatics47936.2019.9119305
https://doi.org/10.1109/informatics47936.2019.9119305