Abstract
In order to improve the aerothermal predictions of high pressure turbine Computational Fluid Dynamics (CFD) simulations, this paper presents a novel method to prescribe unsteady boundary conditions to transient, scale resolving simulations. The method is based on the compression of the interface data at the Combustor Turbine Interface (CTI), by using Proper Orthogonal Decomposition and Fourier Series (PODFS). The interface data can eater be collected from a combustor simulation or artificially created from mean values, using a digital filter method. The stored interface data size can be greatly reduced in the process. Besides the description of the method, this paper presents a set of Large Eddy Simulation (LES) of a generic test case, to demonstrate the capability of the PODFS method, to produce realistic inlet boundary condition. Furthermore, the method is applied to a set of combustor simulation outlet data, to create a reduced order model of the temporally and spatially resolved interface data. With this application to realistic CTI data, the efficiency of the compression method can be demonstrated and the applicability to turbine simulations can be shown.
