Unsteady Flow Over a Butterfly Valve
Sherif, S. A. and Morrow, T. B. and Marshall, L. R. and Dalton, C.
Butterfly valves are used in many engineering devices for controlling fluid flows. However, the flow pattern, caused by the interference of the valve, is generally not known. This study is to develop a numerical method to simulate the unsteady flowfield around a valve of arbitrary shape at a given inclination angle. To simplify the analysis, the valve is considered as two-dimensional in an unrestricted incompressible flowfield. Using the chord length and the incoming velocity as the characteristic dimensions for the length and the velocity scales, respectively, Lugt and Haussling (1974) computed the laminar flowfield around the elliptical cylinders using the Navier-Stokes equations. Since the flow may be laminar or turbulent depending on the valve geometry and the Reynolds number, it is necessary to consider the budget of the turbulent kinetic energy, as discussed by Launder and Spalding (1974), to include the possibility of laminar instability or transition to turbulent flows.
S. C. Lee and C. Chen, "Unsteady Flow Over a Butterfly Valve," American Society of Mechanical Engineers, Fluids Engineering Division, American Society of Mechanical Engineers (ASME), Jan 1990.
Winter Annual Meeting of the American Society of Mechanical Engineers
Mechanical and Aerospace Engineering
Keywords and Phrases
Computers-Applications; Control Systems-Applications; Flow of Fluids-Vortex Flow; Fluid Mechanics; Mathematical Models
Article - Conference proceedings
© 1990 American Society of Mechanical Engineers (ASME), All rights reserved.