Motivation and objectives
The Institute of Turbomachinery and Fluid Dynamics (TFD) operates an aeroacoustic wind tunnel (AWT) designed for acoustic measurements of turbomachinery blade rows. The flow conditions in the AWT replicate the aerodynamic boundary conditions of turbomachinery, while the acoustic boundary conditions and instrumentation ensure sound field measurements without interference from the test bench environment. Currently, the interaction between a synthetically introduced sound field and stator rows can be investigated in the AWT (e.g., SiValT project or aeroacoustic scaling).
In order to be able to examine turbine acoustics more precisely under realistic boundary conditions in the future, the AWT is now being expanded to include a rotating 1 ½-stage low-pressure turbine (LPT). After commissioning, comprehensive aerodynamic and aeroacoustic measurements will be carried out, analyzing the acoustic transmission and reflection behavior of the low-pressure turbine. The pressure-sensitive paint for measuring flat sound fields on the stator blades will also be tested in the project.
Publications
Test rig design for the aeroacoustic investigation of a 1½-stage low-pressure turbine, DOI: ETC2025-160
Responsible institute
The project is managed by the Institute for Turbomachinery and Fluid Dynamics.
