A marine turbocharger 3D compressor design tool, implemented on an existing marine turbocharger retrofit platform is presented. It produces a 3D centrifugal compressor geometry for optimal compressor retrofit. I encompasses two modules, allowing the design process to become fully automatic.First, a 1D compressor multi-point design optimization process is carried out, aiming to provide a fast and reliable solution based on Turbocharged diesel Engine range of operation. Structural integrity is ensured by using 1D static analysis. Dimensionless parameters are used as optimization variables, for a given nominal compressor mass flow and power.Then a CFD compressor multi-point design optimization process is carried out, producing a fully optimized 3D compressor geometry. It complies with the Turbocharged diesel Engine range of operation, while structural integrity is ensured by using Finite Element analysis. A 1D to 3D transformation technique is used to initiate the 3D design procedure.A turbocharger compressor design case study is presented. First, a turbocharger 1D compressor design is carried out, using the 1D optimization process, aiming to at least reconstituting the original diesel engine performance. It is shown that first module provides a reliable impeller geometry or a good entire compressor initial geometry for 3D design module. Using as initial geometry the module 1 solution, a fully 3D compressor designing is performed, using a CFD-FEA optimization process, in order to provide an improved retrofitting solution, aiming to at least reconstituting the original diesel engine performance.Comparison between the multi-point and the traditional one-point design method, shows that the multi-point method provides a wider SFC reduction in the Diesel range of operation that normally works (60%-80% Engine load).

A Marine Turbocharger Compressor Multi-Point 3d Design and Optimization Tool

Paper Proceedings: https://asmedigitalcollection.asme.org/GT/GT2021/volume/84898

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