Predicting Globe Control Valve Performance—Part I: CFD Modeling

Abstract

Computational Fluid Dynamics (CFD) tools are evaluated for use in industrial design applications by predicting primary control valve performance characteristics. The performance parameter of primary interest to the manufacturer is the flow coefficient, Cv. Valves having relative valve capacity factors between 2.5 and 13 were modeled. The control valve Cv was experimentally measured and numerically predicted. Both equal percentage and linear characteristic valves were represented in the study. The numerical (simulation) study presented in Part 1 showed that the valve Cv and the inherent valve characteristic could be accurately predicted using axisymmetric flow models over most of the plug travel. In addition, the study demonstrates the usefulness of simplified CFD analysis for relatively complex 3-D flows.

Numerical Model for Cavitational Flow in Hydraulic Poppet Valves

“…Separating interior flows are of the utmost importance for the performance of wide variety of technical applications [1][2][3][4][5]. Many industrial designs today have to compromise between the hydrodynamical function and other competing functions, for example, size or mechanical function.…”

“…In such compromised designs undesired separation is more likely to occur, this drastically decreases the performance of the design. In such cases, active or passive devices that increase their near-wall momentum can be used to remove or reduce the separation [2,3,6].…”

A Computational Investigation on the Flow of Non‐Newtonian Polymers in Safety Valves

“…The predictions of that model are compared with those for fully laminar and fully turbulent flows: In the latter case the standard k-e model (KES) of Launder and Spalding [15] with enhanced near-wall treatment is applied. k-e turbulence models are very robust, and therefore they are usually employed to calculate liquid flows in valves [16][17][18][19][20].…”

Numerical Calculation for Effect of Fluid-structure Interaction on Flow Field Pressure in High-Flow Control Valve

“…So FSI of control valve for fluid pressure is an important premise of valve design. George Papadakis [6] proposed a new method to solve the problem of fluid-structure interaction, which can be used to predict pipeline pressure fluctuations; James A. Davis [7] et al studied the effect of valve core shape on valve inherent flow characteristics through simulation and experiment methods. Pei Ji [8] established a combined calculation for turbulent flow and structure response of impeller using two-way coupling method to study the effect of FSI of impeller on flow field in centrifugal pump.…”