Hydrodynamic characterization and optimization of Contra-push check valve by numerical simulation

2011 ◽  
Vol 38 (6) ◽  
pp. 1427-1437 ◽  
Author(s):  
Han Xu ◽  
Zheng Ming Guang ◽  
Yu Yi Qi
Keyword(s):  
Numerical Simulation ◽  
Check Valve

Numerical Simulation of a Check Valve Closure Induced by Pump Shutdown

2018 ◽  
Vol 144 (12) ◽  
pp. 06018013 ◽  
Author(s):  
Zhounian Lai ◽  
Qian Li ◽  
Bryan Karney ◽  
Shuai Yang ◽  
Dazhuan Wu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Check Valve ◽  
Valve Closure

Numerical simulation and experimental validation of the cavitating flow through a ball check valve

2014 ◽  
Vol 78 ◽  
pp. 776-786 ◽  
Author(s):  
José R. Valdés ◽  
José M. Rodríguez ◽  
Raúl Monge ◽  
José C. Peña ◽  
Thomas Pütz
Keyword(s):  
Numerical Simulation ◽  
Experimental Validation ◽  
Check Valve ◽  
Cavitating Flow ◽  
Flow Through

scholarly journals Investigation of Check Valve Aerodynamic Characteristics in Different Operating Modes

2018 ◽  
Vol 3 (3) ◽  
pp. 127
Author(s):  
D.A. Pakholik ◽  
A.V. Sobolev ◽  
A.S. Shelegov
Keyword(s):  
Numerical Simulation ◽  
Computational Study ◽  
Ventilation System ◽  
Check Valve ◽  
Aerodynamic Characteristics ◽  
Air Velocity ◽  
Valve Body ◽  
Operating Modes ◽  
System Check ◽  
Actual Flow Rate

The paper presents a computational study of the NPP ventilation system check valve aerodynamics, namely, a numerical simulation of the air flowing through the open valve with the subsequent determination of the relationship between the reactive torque acting on the valve closure axles and the input air velocity.This numerical simulation of the air flowing through the check valve was performed using the ANSYS CFX program. In the computation, different operating modes of the check valve were considered when the air flow was passing through it. The valve operating modes were set depending on changes in the input air velocity. As a result of aerodynamic computation, the values of pressure and velocity components were obtained over the entire valve volume.Reactive forces were calculated in the ANSYS Mechanical program. The reactive forces acting on the valve body form a torque at the gate axles. When adjusting the check valve to the actual flow rate, it is necessary to know this torque value and compensate for it. As a result of a series of computations of reactive forces, a relationship was found between the torque value of the valve’s working element axles and the input air velocity. 

Hydrodynamic Characterization of a Nozzle Check Valve by Numerical Simulation

2008 ◽  
Vol 130 (12) ◽  
Author(s):  
Stefano Sibilla ◽  
Mario Gallati
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
Characteristic Curve ◽  
Flow Simulation ◽  
Check Valve ◽  
Adverse Pressure Gradient ◽  
Temporary Increase ◽  
Pressure Drops ◽  
Boundary Layer Development ◽  
Experimental Values

The ability to obtain correct estimates of the hydraulic characteristics of a nozzle check valve by finite-volume numerical simulation is discussed. The evaluation of the numerical results is performed by comparison of the computed pressure drops inside the valve with experimental measurements obtained on an industrial check valve. It is shown that, even with high mesh refinement, the obtained result is highly dependent on the choice of the turbulence model. The renormalization group theory (RNG) k-ε model proves to be the more accurate to describe the flow inside the valve, which is characterized by repeated flow decelerations and accelerations and by boundary layer development under adverse pressure gradient. Pressure-drop and flow coefficients computed by adopting the RNG model agree well with the experimental values at different positions of the plug. The opening transient of the valve is also analyzed by an unsteady flow simulation where the motion of the plug is taken into account. The characteristic curve of the valve obtained in steady flow conditions is finally compared with the transient opening characteristic, highlighting a temporary increase in the pressure drop, which occurs because of a large unsteady separation region downstream of the plug.

scholarly journals Research on Damping Characteristics of Interconnected Hydropneumatic Suspension considering the Effects of Hose and Check Valve

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Hongmin Zhang ◽  
Xin Fang
Keyword(s):  
Numerical Simulation ◽  
Energy Method ◽  
Damping Ratio ◽  
Check Valve ◽  
Nonlinear Stiffness ◽  
Calculation Formula ◽  
Damping Force ◽  
Damping Characteristics ◽  
Simulation Results ◽  
Stiffness And Damping

The interconnected hydropneumatic suspension (ICHPS) has not only the nonlinear stiffness and damping of the independent hydropneumatic suspension (IDHPS) but also antiroll and antipitch functions. The existing analysis of hydropneumatic suspension damping mainly focuses on the orifice and check valve in the suspension cylinder. In this study, the calculation formula of the damping force of ICHPS is established, and the numerical simulation results show that the damping characteristics of the hydraulic hose cannot be ignored. The influence of check valve and hose on the damping characteristics is analyzed. Through the equivalent energy method, the equivalent compression damping ratio and the equivalent recovery damping ratio of the ICHPS are established. It is pointed out that when designing the damping characteristics of the ICHPS, it is necessary to select the orifices, check valves, and hose damping reasonably to make the damping characteristics get the best match.

Study on Fluid-Structure Interaction Performance of Shuttle Check Valves Based on ADINA

2011 ◽  
Vol 403-408 ◽  
pp. 33-38
Author(s):  
He Jun Li ◽  
Yong Cai ◽  
Bei Ping Xiang ◽  
Gong Dong Cheng
Keyword(s):  
Numerical Simulation ◽  
Geometric Modeling ◽  
Fluid Structure Interaction ◽  
Check Valve ◽  
Flow State ◽  
Parameter Setting ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Contrast Method ◽  
Flow Field Characteristics

To research the flow field characteristics in the shuttle check valve, this paper adopted numerical simulation and contrast method. Based on ADINA, it respectively implemented geometric modeling, parameter setting and fluid-structure interaction calculation on the shuttle valve and the swing check valve. By analyzing visualization results, it derives that the former has the advantages of uniform velocity distribution, steady flow state, equilibrium load on the valve core, etc. compared with the latter in the process of opening, thus providing data basis for optimal design of the shuttle valves.

Water uptake by substituted amylose tablets: experimentation and numerical simulation

2009 ◽  
Vol 00 (00) ◽  
pp. 090904073309027-8
Author(s):  
H.W. Wang ◽  
S. Kyriacos ◽  
L. Cartilier
Keyword(s):  
Numerical Simulation ◽  
Water Uptake
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