Efficiency Approximation of Centrifugal Compressors in the Cordier Diagram

We present a simulation-data-based efficiency approximation for radial turbocompressors, which is implemented in the well-known Cordier diagram. A sophisticated CAE workflow is used to calculate the operational characteristics of 50 machine designs, each with 50 impeller geometry variations. A Kriging-based surrogate model is trained to approximate the efficiency of the best geometry design for any machine design. The models are integrated into a machine design workflow. As a result, duty-specific Cordier lines are introduced. They are automatically generated for a set of machine design parameters. The efficiency of the designs along the duty-specific Cordier lines is estimated. Using optimization techniques, an optimal compressor design for the given duty on each specific Cordier line can be identified. This significantly increases the amount of information available in the early design stages for radial turbocompressors.

DOI 10.26205/opus-3366