3D, steady, incompressible, turbulent k- navier stokes equations are solved numerically to predict the flow behavior and flow coefficient. The present work aims to study the effect of pressure drop, flow coefficient, loss coefficient and flow behavior across different valve design. Based on the ...
PURPOSE:To provide a constantly favorable closely-fit condition b energizing the part of a seat which is closely fit to a valve body by means of a metal spring whose characteristic is less apt to be varied with variation in temperature so as to force the seat onto a valve body at a cert...
Flow Characteristics of Cryogenic Butterfly Valve for LNG Carrier (Part 2 : Flow Characteristics under Cryogenic Condition) The pressure distribution and the pressure loss coefficient of the cryogenic butterfly valve show almost similar pattern with those of the butterfly valve ... SW Kim,YD Choi,...
In order to get good comprehensive properties of butterfly valve plate material applying to water supply system,based on the 1Cr11Ni2W2 Mo V steel,we added Cu and Sn elements respectively to got two kinds of new materials. The mechanical properties,corrosion resistance and processing performance...
Cavitation stages (such as cavitation inception, supercavitation inception, cavitation damage inception, choking cavitation) have been theoretically predicted from the valve loss coefficient. The cavitation prediction has been carried out by applying the free streamline theory, where the relation between the...
Using four pressure transducers and one temperature transducer, the authors determined the volumetric flow rate, the average water velocity and the local pressure loss in the butterfly valve, the flow coefficient K_v and also the incipient cavitation coefficient. Recommendations for the disposal of ...
In order to effectively prevent cavitation and to prevent an increase in pressure loss at a large opening angle, a butterfly valve is configured so that the butterfly valve comprises as basic constitutional members: a cylindrical valve box (1) which forms a part of a flow path; a valve rod...
A butterfly valve having a body provided with a fluid passage therethrough. The fluid passage includes a tapered inner surface. A circular valve member is in the housing across the passage and is secured to a shaft rotatable on the housing. One end of the shaft is in a portion of an an...
Cavitation stages (such as cavitation inception, supercavitation inception, cavitation damage inception, choking cavitation) have been theoretically predicted from the valve loss coefficient. The cavitation prediction has been carried out by applying the free streamline theory, where the relation between the...
Steady state simulations were first performed to obtain the relationship between the valve loss coefficient and the valve opening angle. Based on dynamic mesh techniques, transient state simulations with five different turbulence models, standard k-蔚 model, RNG k-蔚 model, realizable k-蔚 model, ...