Intra-Blade Quantitative Transonic Flow Measurements at the DRA Pyestock Isentropic Light Piston Facility using PIV (Particle Image Velocimetry)
Abstract
The quantitative whole field flow visualization technique of PIV has over the last three years been successfully demonstrated for transonic flow applications. A series of such measurements has been made at DRA Pyestock. Several of the development stages critical to a full engine application of the work have now been achieved at DRA Pyestock using the Isentropic Light Piston Facility (ILPF) operating with high inlet turbulence levels: - A method of seeding the flow with 0.5 micron diameter styrene particles has provided an even (20 mm by 20 mm) coverage of the flow field. - A method of projecting a 1 mm thick high power Nd/YAG laser light sheet within the turbine stator cascade. This has enabled a complete instantaneous intrablade velocity mapping of the flow field to be visualise. - Finally, software has been developed to automatically analyse the data. The measurements provide an instantaneous quantitative whole field visualization of an unsteady region of flow; which has been compared with a full viscous prediction. This work represents the first such measurements to be made in a transonic annular cascade.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1992
- Accession Number
- ADA262903
Entities
People
- I. W. Matthews
- K. S. Chana
- M. Funes- Gallanzi
- P. J. Bryanston-cross