What's inside?
It is found that the ideal gas assumption is not proper for the design of turbomachinery blades using supercritical CO2 (SCO2) as working fluid, especially near the critical point. Therefore, the inverse design method which has been successfully applied to the ideal gas is extended to applications for the real gas by using a real gas property lookup table.
A fast interpolation lookup approach is implemented, which can be applied both in superheated and two-phase regimes. This method is applied to the design of a centrifugal compressor blade and a radial-inflow turbine blade for a S-CO2 recompression Brayton cycle.
The stage aerodynamic performance (volute included) of the compressor and turbine is validated numerically by using the commercial CFD code ANSYS CFX R162. The structural integrity of the designs is also confirmed by using ANSYS Workbench Mechanical R162.
In this publication, you will:
- Learn about the development of supercritical CO2 and the challenges it presents.
- Understand how the real gas effect was brought into the inverse design method using a lookup table.
- Discover how the method was validated using the blade loading obtained from the inverse design along with 3D CFD simulations.
