Title :
Numerical Simulation for Hydraulic Characteristics of Cylindrical Valve in Runaway Protection Process
Author :
Guo Chunli ; Wang Guodong ; Xiao Juliang
Author_Institution :
Key Lab. for Adv. Manuf. Technol. & Equip. of Tianjin, Tianjin Univ., Tianjin
Abstract :
In the present paper, numerical simulation about the emergency shut-down water process of cylindrical valve is performed in order to study hydraulic characteristics of three dimensional unsteady flow during runaway protection of cylindrical valve. The curves of the pressure distribution, the axial force exerting on the valve are given with the time passing under various openings. In addition, the pressure fluctuation caused by the unsteady flow of vortex tape through Francis turbine is provided and analyzed, which provides the reference for the installation and maintenance of hydro-generator unit along with the design of multi-cylinder synchronous motion system.
Keywords :
flow; hydraulic turbines; hydroelectric generators; maintenance engineering; numerical analysis; valves; Francis turbine; axial force; cylindrical valve; emergency shut-down water process; hydraulic characteristics; hydro-generator unit; multicylinder synchronous motion system; numerical simulation; pressure distribution; runaway protection process; three dimensional unsteady flow; vortex tape; Blades; Boundary conditions; Equations; Hydraulic turbines; Laboratories; Numerical simulation; Protection; Spirals; Valves; Water;
Conference_Titel :
Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-2486-3
Electronic_ISBN :
978-1-4244-2487-0
DOI :
10.1109/APPEEC.2009.4918531
