The inducer starts at the eye and usually finishes in the region where the flow is beginning to turn into the radial direction.This relative flow is turned into the axial direction by the inducer section or rotating guide vanes.At the entry to the impeller the relative flow has a velocity Vr1, at angle α1 to the axis of rotation as shown in Fig.Different cross-sections are employed for the volute passage are rectangular, circular, and trapezoidal.The air leaving the diffuser is collected in a spiral passage known as volute or scroll and the volute discharges the air through the delivery pipe.A diffuser consisting of a number of fixed diverging passages in which the air is decelerated with a consequent rise in static pressure. Impellers may be enclosed by having the shroud attached to the vane ends (called shrouded impellers) or unenclosed with a small clearance gap between the vane ends and the stationary wall.Ĥ.(Shrouding an impeller eliminate tip leakage losses but at the same time increases friction losses.) The shroud is the curved surface C-D forming the outer boundary to the flow of fluid.The hub is the curved surface of revolution of the impeller A-B.The impeller vanes help to transfer the energy from the impeller to the fluid.Both static pressure and velocity of fluid are increased in the impeller.The function of the impeller is to increase the energy level of fluid by whirling it outwards by increasing the angular momentum of the fluid.The inlet guide vanes should be chosen so as to obtain a minimum relative Mach number at the eye tip.The function of inlet guide vanes is to direct the flow in the desired direction at the entry of the impeller.The outlet of the inlet casing is known as the impeller eye.The inlet flange is axisymmetric and the inlet duct takes the form of a simple converging nozzle.The function of the inlet casing is to accelerate the fluid from its initial condition to the entry of inlet guide vanes and to provide uniform velocity at the eye.Difference between Centrifugal Compressor and Reciprocating Compressor :Ĭentrifugal Compressor Centrifugal CompressorsĪ centrifugal compressor is a radial flow rotodynamic fluid machine that uses mostly air as the working fluid and utilizes the mechanical energy imparted to the machine from outside to increase the total internal energy of the fluid mainly in the form of increased static pressure head.Ĭentrifugal Compressor Diagram : Centrifugal compressor parts.Difference between Centrifugal Compressor and Axial Flow Compressor :.Applications of Centrifugal Compressor :.Disadvantages of Centrifugal Compressor.Velocity Diagram of Centrifugal Compressor.Pressure and velocity variation across a centrifugal compressor:.Working Principle of Centrifugal Compressor :.
Characteristics Features of Centrifugal Compressors.
0 kommentar(er)
