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Session: Simulation and design tools: CFD
Session starts: Tuesday 08 October, 10:00
Presentation starts: 10:00
Room: Van Weelde Zaal

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Matteo Pini (Politecnico di Milano)
Giacomo Persico (Politecnico di Milano)
David Pasquale (Università di Brescia)
Antonio Ghidoni (Università di Brescia)
Stefano Rebay (Università di Brescia)

Abstract:
Organic Rankine Cycles (ORC) are nowadays a well-established technology compared to steam Rankine Cycles for heat sources characterized by low to medium temperatures. Despite their relatively simplicity and cost-effectiveness, ORC technology presents intrinsic difficulties connected to the design of the turbine, due to the onset of complex real gas-dynamic phenomena. Improvements in the fluid-dynamic design of the turbo-expanders are therefore expected to considerably enhance the performance of the overall system. As a result the implementation of specific fluid-dynamic design procedures, which generally imply the use of advanced optimization methods coupled with accurate flow solvers, is of paramount importance for the whole ORC technology. In this perspective this research presents a novel adjoint-based method for shape optimization of turbomachinery blades in real gas flow applications. In order to investigate the potential of the method, the optimization strategy is finally applied to the re-design of an ORC supersonic cascade.