Bistable Flow Occurrence in the 2D Model of a Steam Turbine Valve

0483229 - ÚT 2018 RIV US eng C - Conference Paper (international conference)
Procházka, Pavel P. - Uruba, Václav
Bistable Flow Occurrence in the 2D Model of a Steam Turbine Valve.
AIP Conference Proceedings. Vol. 36. New York: AMER INST PHYSICS, 2017 - (Žítek, P.; Klimko, M.; Newton, K.), č. článku 020029. 1889. ISBN 978-0-7354-1572-0.
[Meeting of Departments of Fluid Mechanics and Thermodynamics /36./. Plzeň (CZ), 13.06.2017-15.06.2017]
R&D Projects: GA TA ČR(CZ) TA04011437; GA TA ČR(CZ) TA04020129
Institutional support: RVO:61388998
Keywords : PIV * OPD * diffuser
OECD category: Fluids and plasma physics (including surface physics)
http://aip.scitation.org/doi/pdf/10.1063/1.5004363

The internal flow inside a steam turbine valve was investigated experimentally using PIV measurement. The valve model was proposed to be two-dimensional. The model was connected to the blow-down wind tunnel. The flow conditions were set by the different position of the valve plug. Several angles of the diffuser by diverse radii were investigated concerning flow separation and flow dynamics. It was found that the flow takes one of two possible bistable modes. The first regime is characterized by a massive flow separation just at the beginning of the diffuser section on the one side. The second regime is axisymmetric and the flow separation is not detected at all.
Permanent Link: http://hdl.handle.net/11104/0279629