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Design of a double-suction fan stage to improve efficiency by up to 4 points

Streamline flow in double suction fan stageOur client is one of the leading turbomachinery manufacturers. In this project, they asked ADT to perform a complete stage analysis of a double suction fan stage, then redesign the fan impeller using the inverse design code in TURBOdesign1 in order to improve the aerodynamic performance.

Project details:

Design Targets

The design and analysis of an existing double-suction fan stage including inlet ducts, connecting channels, impeller and volute, with the redesign of fan impeller for improved aerodynamic efficiency.


Redesign of the impeller geometry.


Normalised total to total efficiency of the fan stage designImpact

The stage efficiency was improved by up to 4 points.

A parametric study was performed using TURBOdesign1 in order to find the effects of the design parameters on the fan performance.

The geometrical constraints were to reduce manufacturing costs and included a constant thickness (airfoil shape was not acceptable), straight filament blade geometry and low to moderate stacking shape.

Stage analysis of the double-suction fan with the final redesigned impeller showed significant improvement in the efficiency (about 4 points at design point) and improved stall performance as shown in Fig. 2.

 Download design of a double-suction fan stage consultancy summary now 


 Would you like to learn more about how you can optimize your fan performance?

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Design Optimization of Fans Workshop 2018

The event will bring together engineers and designers interested in the unique capabilities of 3D Inverse Design technology applied to the design and optimization of axial, mixed-flow and centrifugal fans. Learn more about the workshop now.

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About Advanced Design Technology

We provide software and services for the design and optimization of turbomachinery, based on our unique 3D Inverse Design technology. Our tools and services help customers achieve innovative “breakthrough” designs, delivering market leading solutions at dramatically reduced development costs.

ADT, headquartered in London, UK, was established in 1999 as a joint venture between University College London and The Ebara Research Co Limited of Japan. We are considered as one of the leading global turbomachinery design software providers, with our TURBOdesign Suite tool set in use across a very wide range of applications and sectors. 

Our design consultancy services deliver cutting-edge solutions to our global customers. Whether the task involves a complete solution, from concept to final design for manufacturing, or is facing challenging multi-point / multi-objective design optimization, we work closely with our customers and support them throughout the entire design process.

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