Unsteady Methods Applied to a Transonic Aeronautical Gas Turbine Stage

TitleUnsteady Methods Applied to a Transonic Aeronautical Gas Turbine Stage
Publication TypeConference Proceedings
Year of Publication2018
AuthorsAmato G, Giovannini M, Marconcini M, Arnone A
Conference NameATI 2018 - 73rd Conference of the Italian Thermal Machines Engineering Association
VolumeEnergy Procedia 148
Conference LocationPisa, Italy, 12-14 September
ISSN Number1876-6102
Accession NumberWOS:000480453000010
Other NumbersScopus 2-s2.0-85056570560
KeywordsCFD, Non-Linear Harmonic, transonic turbines, unsteady

The importance of considering the unsteady effects in aeronautical engine design has brought to the implementation of simplified unsteady CFD models to respect the temporal restrictions of design cycles. A comparison among steady, Non-Linear Harmonic (NLH) and Full-Annulus (FA) methods has been carried out analyzing the transonic turbine stage CT3, experimentally studied at von Karman Institute for Fluid Dynamics. The understanding of the unsteady phenomena is fundamental to increase the engine efficiency and is precluded in steady calculations. As the computational cost of NLH calculations is of the same order of magnitude of steady ones, it represents a valid and competitive option in a turbine design process.

Refereed DesignationRefereed