Additively Manufactured Cooled Turbine for Supercritical Co2 Power Cycle

Additive manufacturing (AM) has a substantial impact on the manufacturing process and experience in the aerospace and mechanical industry. AM receives attention from academia and industry due to its capability to print complex geometry more efficiently and its comparable strength with conventionally manufactured materials. The research is focused on AM design of the turbine blade for the supercritical CO2 turbines with a maximal power of 100 MW, maximal operation temperature 1350 K and operation pressure up to 25 MPa. Considering the extreme temperature and high-pressure parameters, the conceptual design is done for a closed-loop supercritical power cycle (compressor, heat exchanger, turbine, intercooler) by using a one-dimensional mean line design. The efficiency of each stage is decided.

This research will use a selection of design parameters and aerodynamic design values will be explained in a step by step process. The single blade is designed with an internal cooling channel based on powder bed fusion technique-Additive manufacturing process requirements.

The second part of the research will show the varying viscosity, pressure, temperature and Cp values are observed in the blade section. The STAR CCM+ is used to run the simulation for the blade section to understand the changing of thermodynamic properties. The temperature variation over the blade surface will be shown in detail for a detailed understanding of blade design.