Flow directions in a centrifugal compressor Confirm the standard flow pattern: in a centrifugal compressor the air enters the impeller axially and leaves the vanes in a predominantly radial direction.

Introduction / Context:Centrifugal compressors are defined by their radial flow path through the impeller. Understanding the basic flow directions helps with interpreting velocity triangles, diffuser design, and overall stage performance.

Given Data / Assumptions:

• Standard single-stage centrifugal compressor with axial entry and radial exit.
• Negligible prewhirl for the basic statement (though prewhirl may be used in practice).

Concept / Approach:To minimize inlet losses and maintain compact geometry, flow is brought axially into the eye of the impeller. The spinning impeller imparts tangential and radial components, throwing the air outward; the diffuser then recovers static pressure from the high-velocity radial flow.

Step-by-Step Solution:Inlet guide ensures near-axial entry to the impeller eye.Rotating blades add swirl and kinetic energy; the flow path bends to radial through the impeller passages.At exit, the flow is predominantly radial before diffusion and volute collection.Therefore, the statement is correct.

Verification / Alternative check:Standard compressor schematics and velocity triangles depict axial entry and radial discharge for centrifugal stages.

Why Other Options Are Wrong:Answering ‘‘No’’ conflicts with the very definition and geometry of centrifugal compressors.

Common Pitfalls:Confusing centrifugal compressors with axial compressors where both entry and exit are axial.

Final Answer:Yes