Trends in turbomachinery turbulence treatments

The need for improved measurements with well defined boundary conditions that have Reynolds stress and even spectral information, at Reynolds and Mach numbers that connect with typically powerful turbomachinery systems is identified. This is necessary to refine both RANS and eddy resolving strategies. Most available 'Best Practices' are centred on RANS. Hence, new guidance needs to be developed for eddy resolving methods. Expert systems, based around flow taxonomies, that can assist with for example making initial grid estimates and guiding aerodynamicists through the eddy resolving simulation process are discussed. The need for more turbomachinery relevant strategies for generating turbulence inflow is identified.