دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

annular flow valve.

n: the velocity at the transitional point between laminar and turbulent fluid flow. See laminar flow, turbulent fluid flow. critical volume n: the specific volume of gas at its critical temperature and pressure.

n: The flow velocity that the flow condition of fluid changes from flowing sheet of water to turbulent flow.

n: the flowing pressure of slurry when it cycles in the well,and the pressure is in connection with the density,plastic viscosity,shearing force and flow velocity of the slurry

n: a valve used automatically to prevent the liquid flow rate in a pipeline from exceeding a high limit.

n: 1. an accurately calibrated, usually U-shaped, pipe used to check, or prove, the accuracy of a meter on a LACT unit or other oil measuring installation. 2. a type of continuous-flow volumetric prover comprising a length of pipe from which a known volume is displaced by a displacer to or from a meter being proved at normal operating conditions.

n: a dimensionless number defined as Re =ruD/m Where D = inside diameter of the pipe u = mean flow velocity r = density of the fluid m= dynamic viscosity, all in consistent units.

n: A demensionless number,which be used to judge the flowing condition of the fluid .Its code is Re.



an experimental number used in fluid flow to predict the flow velocity at which the flow regime moves from laminar flow through a transition range and into turbulent flow. It is the dimensionless ratio of inertial forces to viscous forces in flowing fluid

radial flow valve.

a limit flow velocity for a specific fluid, either minimum or maximum, that would accomplish a task. Threshold Velocities are usually minimums to promote liquid lift in a gas well, or a minimum velocity to keep a pipe surface clean.