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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Funes-Gallanzi, M. Bryanston-Cross, P. J. Chana, K. S. |
| Copyright Year | 1994 |
| Abstract | The quantitative whole field flow visualization technique of PIV has over the last few 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 using the Isentropic Light Piston Cascade (ILPC) test facility operating with high inlet turbulence levels: • A method of seeding the flow with 0.5μm diameter styrene particles has provided an even 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 intra-blade velocity mapping of the flow field to be visualized, by a specially developed diffraction-limited optics arrangement. • Software has been developed to automatically analyze the data. Due to the sparse nature of the data obtained, a spatial approach to the extraction of the velocity vector data was employed. • Finally, a comparison of the experimental results with those obtained from a three-dimensional viscous flow program of Dawes; using the Baldwin-Lomax model for eddy viscosity and assuming fully turbulent flow. The measurements provide an instantaneous quantitative whole field visualization of a high-speed unsteady region of flow in a highly three-dimensional nozzle guide vane; which has been successfully compared with a full viscous calculation. This work represents the first such measurements to be made in a full-size transonic annular cascade at engine representative conditions. |
| Sponsorship | International Gas Turbine Institute |
| File Format | |
| ISBN | 9780791878835 |
| DOI | 10.1115/94-GT-349 |
| Volume Number | Volume 1: Turbomachinery |
| Conference Proceedings | ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition |
| Language | English |
| Publisher Date | 1994-06-13 |
| Publisher Place | The Hague, Netherlands |
| Access Restriction | Open |
| Subject Keyword | Viscosity Nd-yag lasers Visualization Turbulence Test facilities Transonic flow Blades Cascades (fluid dynamics) Computer software Optics Flow (dynamics) Engines Pistons Diffraction Particulate matter Eddies (fluid dynamics) Wakes Flow visualization Stators Nozzle guide vanes Turbines Viscous flow |
| Content Type | Text |
| Resource Type | Article |
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