The geometry is given in STEP format. Download here. The following video shows you how to import the geometry file into Ansys SpaceClaim.
Note the areas of the inlet and outlets, compared to those in the book.
Make sure to save the project.
Note that the default geometry engine is now Discovery rather than SpaceClaim. So you have to right-click on Geometry and select New SpaceClaim Geometry. If you open Discovery by mistake, you have to close it and select Reset under Geometry