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