Question

The primary function of the inducer in a centrifugal compressor is to

• A. Increase static pressure significantly
• B. Reduce inlet Mach number and guide flow smoothly into the impeller
• C. Convert kinetic energy into pressure energy
• D. Increase whirl velocity at exit

Hint:

The inducer helps to \[ \boxed{ \begin{aligned} &\downarrow\ \text{Inlet Mach Number} &\uparrow\ \text{Smooth Flow into the Impeller} \end{aligned} } \] thus reducing shock and incidence losses.

Answer 1

The Correct Option is B

Step 1: Recall the function of an inducer. The inducer is the inlet portion of the impeller in a centrifugal compressor. Its purpose is to ensure smooth entry of air into the impeller.

Step 2: Identify its primary role. The inducer reduces the inlet Mach number and minimizes flow separation by guiding the flow smoothly into the impeller. Hence, \[ \boxed{ \text{Reduce inlet Mach number and guide flow smoothly into the impeller.} } \] Therefore, \[ \boxed{(B)} \] is the correct answer.