National Repository of Grey Literature 19 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Creation and Validation of Pressure Loss Model for Steam Turbine Control Valves
Sláma, V. ; Mrozek, L. ; Tajč, L. ; Šimurda, David ; Hála, Jindřich
In this paper, a creation and a validation of the pressure loss model for the specific and widely used design of the steam turbine inlet control valve assembly called an L-valve is described. This model is based on a wide range of experimental measurements on the valve model installed in an air tunnel and it is validated by numerical simulations using the commercial code. The results of experimental measurements as well as numerical simulations are shown. Furthermore, differences between experimental and numerical results are discussed. According to the results, the pressure loss model in the form of a smart and effective procedure for calculating the valve assembly pressure losses and choosing an optimal valve sizes has been created.\n
Measurements on TR-U-9 Cascade
Luxa, Martin ; Šimurda, David ; Hála, Jindřich
The report contains results and evaluation of conducted optical (interferometry and schlieren technique), pneumatic and CTA (hot films) measurements on the second variant of the tip section, intended for long rotor blade.
Numerical and Experimental Investigation of Compressible Viscous Fluid Flow in Minichannels
Prausová, H. ; Bublík, O. ; Vimmr, J. ; Hála, Jindřich ; Luxa, Martin
The study is focused on the value of critical Reynolds number Rec and also on suitable approaches to the measuring and modelling of the compressible viscous fluid flow in narrow channels. The results of numerical simulations performed using an in-house code based on the discontinuous Galerkin finite element method are compared with experimental data. The chosen approaches and numerical methods prove themselves to be suitable for investigation of the compressible flow in narrow channels and can be used in future research in this area.
Effects and development of the near-wall flow in the hub section of the last stage steam turbine blade
Hála, Jindřich ; Šimurda, David ; Luxa, Martin ; Fürst, J. ; Bobčík, M. ; Novák, O. ; Synáč, J.
This paper deals with the investigation of three-dimensional vortex structures in the near-wall region of the blade cascade which represents the model of the hub section blading of last stage blades of a steam turbine. The investigation aims to describe the development and mutual interaction of the vortex structures and its influence on the kinetic energy losses. The analyses are based on the RANS numerical simulations and experiments conducted in the high-speed wind tunnel.\n\n
Measurements on KR-D-2 Blade Cascade
Šimurda, David ; Luxa, Martin ; Radnic, Tomáš ; Hála, Jindřich
This report contains results and evaluation of aerodynamic measurements conducted on second variant of transonic compressor blade cascade.
Measurements on KR-D-1 Blade Cascade
Šimurda, David ; Luxa, Martin ; Radnic, Tomáš ; Hála, Jindřich
This report contains results and evaluation of aerodynamic measurements conducted on a transonic compressor blade cascade.
Measurements on NACA 0010-64 profile
Luxa, Martin ; Hála, Jindřich
The research report deals with transonic flow past the symmetrical profile with different roughness of its leading edge region. Both the interferometric methods and methods of hot film measurements were used (for measurement of the position of boundary layer transition).
Measurement on Valve II - Appendix
Šimurda, David ; Hála, Jindřich ; Luxa, Martin
Report contains results and evaluation of pneumatic measurements conducted on the overloading valve system.
Unsteady Measurement on Valve I
Šimurda, David ; Hála, Jindřich ; Luxa, Martin
Report contains results and evaluation of unsteady pneumatic measurements contucted on the valve system.
Design of low-subsonic blade cascade model for aero-structural dynamic testing
Pešek, Luděk ; Hála, Jindřich ; Šulc, Petr ; Chládek, Štěpán ; Bula, Vítězslav ; Uruba, Václav ; Cibulka, Jan
Low-subsonic blade cascade model for aerodynamic testing was design in the Institute. The aim is to study the flow dynamics and flutter phenomenon in the cascade with moving blade profiles. The numerical calculations of two proposed cascades were performed for analysis of influence of stagger angle, incident angle of flow and inter-blade phase angles of the relative movement of blades. The results of numerical simulations of fluid dynamics of non-stationary flow both as viscid and non-viscid are presented. Futhermore the solution of the physical model of the designed cascade including excitation of profiles, measuring of the profile displacement and aerodynamic forces are described.

National Repository of Grey Literature : 19 records found   1 - 10next  jump to record:
See also: similar author names
2 Hala, Josef
3 Hála, Jakub
2 Hála, Jaroslav
2 Hála, Jiří
Interested in being notified about new results for this query?
Subscribe to the RSS feed.