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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Giel, P. W. Sirbaugh, J. R. Lopez, I. Fossen, G. J. Van |
| Copyright Year | 1994 |
| Abstract | Experimental measurements in the inlet of a transonic turbine blade cascade showed unacceptable pitchwise flow non-uniformity. A three-dimensional, Navier-Stokes computational fluid dynamics (CFD) analysis of the imbedded bellmouth inlet in the facility was performed to identify and eliminate the source of the flow non-uniformity. The blockage and acceleration effects of the blades were accounted for by specifying a periodic static pressure exit condition interpolated from a separate three-dimensional Navier-Stokes CFD solution of flow around a single blade in an infinite cascade. Calculations of the original inlet geometry showed total pressure loss regions consistent in strength and location to experimental measurements. The results indicate that the distortions were caused by a pair of streamwise vortices that originated as a result of the interaction of the flow with the imbedded bellmouth. Computations were performed for an inlet geometry which eliminated the imbedded bellmouth by bridging the region between it and the upstream wall. This analysis indicated that eliminating the imbedded bellmouth nozzle also eliminates the pair of vortices, resulting in a flow with much greater pitchwise uniformity. Measurements taken with an installed redesigned inlet verify that the flow non-uniformity has indeed been eliminated. |
| Sponsorship | International Gas Turbine Institute |
| File Format | |
| ISBN | 9780791878835 |
| DOI | 10.1115/94-GT-237 |
| 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 | Geometry Turbine blades Computational fluid dynamics Blades Cascades (fluid dynamics) Computation Vortices Nozzles Flow (dynamics) Pressure Turbines |
| Content Type | Text |
| Resource Type | Article |
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