<p>This paper proposes an alternative method to the Cordier line for the selection of compressor meridional topology (i.e. axial, mixed, radial) during preliminary design. This method is based on a careful parameterization of the design space and extensive exploration using CFD. This yields a set of Smith charts that present sections through the design space – from which an increased fidelity of design information can be accessed early in the design process. The data on which the study is based has two advantages over previous methods: Firstly, the geometry of each compressor is fully specified and systematically controlled. Each compressor is defined by a consistent set of design rules derived from the open literature to specify meridional geometry, blade sections and stacking. Secondly, a much larger dataset covering a wider design space can be created using 3D RANS CFD (circa 6000 compressors are used in this paper). This paper shows how the optimal compressor topology at each duty point on the Smith Chart can be determined, as well as the line of duty points at which optimal performance is achieved as topology changes from axial to radial. It also shows how the meridional design parameters (e.g. hub to tip ratio, inlet to exit radius ratio, inlet to exit area ratio and hade angle) can be used to manipulate the location of this optimal line.</p>

Selecting a Compressor Meridional Topology: Axial, Mixed, Radial.

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

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