The Application of Particle Image Velocimetry (PIV) in a Short Duration Transonic Annular Turbine Cascade
Abstract
A series of experiments was performed to demonstrate the application of Particle Image Velocimetry to turbomachinery flows. The tests were performed at transonic speeds on a fully annular engine size turbine nozzle guide vane. The vane cascade was installed in a short duration Isentropic Light Piston Cascade (ILPC) test facility operating with high inlet turbulence levels. The technique has been shown to map the whole flow field with a resolution of 0.5 mm. The quality of the results obtained are not significantly affected by local turbulence rates. The accuracy of the measurements is put at around 4% of absolute velocity and is limited by the quality of the image on the film plane. The velocities derived from the PIV images have been compared with predictions from a three-dimensional viscous numerical calculation. It is shown that the experimental and predicted results are in good agreement. It is considered that this technique has considerable potential in application to turbomachinery flow field diagnostics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1991
- Accession Number
- ADA236639
Entities
People
- C. E. Towers
- P. J. Bryanston-cross
- S. P. Harasgama
- S. T. Hopwood
Organizations
- Royal Aircraft Establishment