Free Publication

Hydrodynamic Design of Pump Diffuser Using Inverse Design Method and CFD

Written by Prof. Mehrdad Zangeneh, University College London, and Akira Goto, Ebara Research Co Ltd.

What's inside?

A new approach to optimizing a pump diffuser is presented, based on a three-dimensional inverse design method and a Computational Fluid Dynamics (CFD) technique.

The improvements in stage efficiency were confirmed experimentally over the corresponding conventional pump stage. The application of multi-color oil-film flow visualization confirmed that the large area of the corner separation was completely eliminated in the inverse design diffuser.


Hydrodynamic Design of Pump Diffuser Cover

The validity of this new design methodology, which directly controls 3-D pressure fields and secondary flows, has already been confirmed for a wide range of diffuser pump specific speeds. Appreciable improvements in hydraulic performance have been confirmed experimentally over conventional designs by using CFD based state-of-the-art approach.

In this publication, you will:

  1. Discover a new methodology to directly control 3D pressure fields and secondary flows;
  2. Understand how the 3D inverse method can suppress corner separation by using fore loading at the hub;
  3. See the optimization of the three-dimensional pressure fields and the flow behavior inside the flow passage.