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

fYear

2009

fDate

27-31 March 2009

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APPEEC.2009.4918531

Filename

4918531