HD GAS TURBINE 0D/1D MODELING AND OPTIMIZATION

This project was brought to light thanks to the collaboration between the Polytechnic of Turin and EthosEnergy S.p.A., a company that operates in the turbomachinery field through design, production, and maintenance of its components. The Thesis aims at the modelling and optimization of a gas turbine unit through the different AxSTREAM software solvers. The gas turbine in discussion goes with the name FR1625. AxSTREAM is a software platform for multidisciplinary design, analysis and optimization, provides an integrated and streamlined approach to turbomachinery design. There are different software belonging to AxSTREAM that can study the turbomachinery by various approaches. In the case of this thesis, AxSTREAM solver has been used to model both the compressor and the turbine, the cooling network instead was carried out by AxSTREAM NET. Although this part of the work with NET software has already been done. The third and herein is the software under the spotlight is AxSTREAM ION: it integrates and automates the full machinery design process, Turbine, compressor, burner, and cooling network. By making these sparse and individually analyzed parts of the gas turbine be grouped up and together modeled, it allows an easier understanding of how the system works, especially in off design conditions. It integrates and automates the full machinery design process, by doing so it enables transferring data to and from various software of AxSTREAM, iterating between design and analysis steps for new product development as well as visualize the digital version of a machine to investigate reliability and equipment against real world conditions. We shall study the turbine unite under design conditions, then it shall be analyzed in off design mode, focusing on the change of environmental temperature at the compressor inlet as a first cause of off-design. The behavior of the GTU when the inlet temperature changes is already known, we shall use these data to validate the VGTU. Another validation is carried out to verify the compliance of the VGTU is by studying the efficiency trend in different of design cases. As second step in the off-design analysis, controlling the fuel mass flow rate governing technique is to be adopted to adjust the power output.