---
title: Design of a double-suction fan stage to improve efficiency by up to 4 points
description: Learn how ADT performed 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.
---

[Blog | Advanced Design Technology ](https://blog.adtechnology.com)

# [Design of a double-suction fan stage to improve efficiency by up to 4 points](https://blog.adtechnology.com/design-of-a-double-suction-fan-stage)

 Written by [Darshan Patel](https://blog.adtechnology.com/author/darshan-patel) | 15-Aug-2018 08:36:38

Our 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 [TURBOdes](https://www.adtechnology.com/products)[ign1](https://www.adtechnology.co.uk/technology/turbodesign-suite/turbodesign-1) in order to improve the aerodynamic performance.

**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.

**Deliverables**

Redesign of the impeller geometry.

**Impact**

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.

 

[View full post](https://blog.adtechnology.com/design-of-a-double-suction-fan-stage)

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