Centrifugal compressors use an impeller to add energy to continuously flowing fluid and increase pressure. They achieve pressure rise through a rotor/impeller. The static pressure rise in the impeller is roughly equal to the rise in the diffuser. The diffuser consists of stationary vanes surrounding the impeller that guide the exiting liquid through an increasing flow area. This gradual expansion allows for a less turbulent area and reduces velocity by converting kinetic energy to increased flow pressure.

1. DIFFUSER
OF A CENTRIFUGAL PUMP
Amritansh Manthapurwar
III-SEM, SEC-A, Roll No- 09
Mechanical Dept.

2. INTRODUCTION
❖ Centrifugal compressors, sometimes called
impeller compressors or radial compressors,
are a subclass of dynamic axisymmetric
work-absorbing turbomachinery.
❖ They achieve pressure rise by adding energy to the
continuous flow of fluid through the rotor/impeller.
❖ The static pressure rise in the impeller may roughly
equal the rise in the diffuser.

3. PART - CENTRIFUGAL COMPRESSOR
FIGURE: CENTRIFUGAL COMPRESSOR

4. DIFFUSER - CONSTRUCTION
❖ A diffuser is a set of stationary vanes that surround the impeller.
❖ The diffuser vanes are designed in a manner that the liquid exiting the impeller will
encounter an ever increasing flow area as it passes through the diffuser.

5. WORKING
❖ The purpose of the diffuser is to increase the efficiency of the centrifugal pump by allowing a
more gradual expansion and less turbulent area for the liquid to reduce in velocity.
❖ The increase in flow area causes reduction in flow velocity, converting kinetic energy into flow
pressure.

6. WORKING ANIMATION
❖ https://www.youtube.com/watch?v=hPHcNY8VMdQ
❖ https://www.youtube.com/watch?v=tcjkyN4UR-k

7. THANK YOU