3D Inverse Design of a Centrifugal Compressor with Tandem-Blade Configuration

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In centrifugal compressor design, previous studies have shown the potential of achieving enhanced performance through the inclusion of tandem blades. The conventional design method for this type of machines is based on splitting a baseline impeller into main and tandem blade, and applying appropriate pitch-wise and streamwise displacements. This simple design method has been proven insufficient in achieving better performance than the baseline design, without extra design modifications.

In this webinar, a design workflow based on a 3D inverse design method is specifically assembled and applied to the tandem-blade design of centrifugal compressors. The blade geometry is controlled by imposing specified distributions of blade loading in tandem and main blades. Starting from an initial full blade design, different tandem-blade designs are generated using the inverse design methodology. Performance of the initial and optimised designs are then assessed by 3D CFD analysis at design and off-design conditions. The mechanism of performance improvement is investigated in detail. In addition, the structural performance of the generated designs is also assessed by means of FEA.


Introduction to tandem-blade designs

Main questions:
• How to design tandem-blade centrifugal compressors?
• How do different loss generation mechanisms vary between full and tandem designs?
• How is 3D inverse design helpful in designing tandem-blade compressors?

Radiver test case

Tandem blade baseline design 
• Design methodology using 3D inverse design
• CFD and FEA results

• Design of experiments
• Response surface model
• Optimization setup and results

Tandem-blade optimised design
CFD and FEA results

Entropy analysis
• Full and tandem-blade designs comparison
• How is the improvement obtained?



Who is it for?

The event addresses all engineers, developers or researchers dealing with turbomachinery design.

Meet the Speaker


Ricardo Oliveira

Turbomachinery Design Engineer at Advanced Design Technology

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