Unsteady Turbomachinery Flows in linear cascades

The vision outlined in this proposal is to understand and model truly unsteady turbomachinery flows, use novel software and high-performance computation to address flow physics and solve keyunresolved issues.

We have the required new and efficient software tools, background in simulation ofaeronautical flows, tools and experience in analyzing unsteady flow physics, and key experimental collaborators.We will address the flow physics associated highly unsteady stator-rotor interactions in turbomachinery flows inlinear cascades, aiming to understand flow features that strongly affecting the performance of turbo engines.Analysis of such flows are intrinsically difficult since there is no statistically steady or averaged solution to basethe modelling on, and there is thus a need for new methods in order for them to be understood.

Novel methodsaddressing such unsteady aspects will be further developed and utilized.Simulations incorporating such unsteady effects must be highly efficient and run on the largest computationalinfrastructure available.

The newly developed GPU version of the well-known Nek5000 code, the Neko-code, willenable simulations more than an order of magnitude larger than presently possible.All of this combined give us a unique opportunity to solve some of the fundamental unresolved issues in turbomachinery flows, which will improve efficiency in turbomachinery applications, and contribute to C O2 emissionreductions.