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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Dimitri, P. Tselepidakis Kim, Sung-Eun |
| Copyright Year | 1996 |
| Abstract | This paper presents the computation of the flow around a controlled diffusion compressor cascade. Features associated with by-pass transition close to the leading edge — including laminar leading-edge separation — contribute significantly to the evolution of the boundary layer on the blade surface. Previous studies have demonstrated that conventional k-ε models, based on linear or non-linear Boussinesq stress-strain relations, are able to capture by-pass transition in simple shear, but are unable to resolve transitional features in complex strain, like the leading-edge separation bubble, which is of considerable influence to the suction-side flow at high inlet angle. Here, the k-ω turbulence model has been implemented in a nonstaggered, finite-volume based segregated Reynolds-Averaged Navier-Stokes solver. We demonstrate that this model, if properly sensitized to the generation of turbulence by irrotational strains, is capable of capturing the laminar leading-edge separation bubble. The real flow around the leading edge is laminar and the transition is only provoked on the reattachment region. Additional investigation of transition in a flat-plate boundary layer development has also produced reasonably promising results. |
| Sponsorship | International Gas Turbine Institute |
| File Format | |
| ISBN | 9780791878729 |
| DOI | 10.1115/96-GT-411 |
| Volume Number | Volume 1: Turbomachinery |
| Conference Proceedings | ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition |
| Language | English |
| Publisher Date | 1996-06-10 |
| Publisher Place | Birmingham, UK |
| Access Restriction | Open |
| Subject Keyword | Suction Turbulence Blades Flat plates Cascades (fluid dynamics) Compressors Separation (technology) Stress-strain relations Flow (dynamics) Modeling Diffusion (physics) Bubbles Computation Shear (mechanics) Boundary layers |
| Content Type | Text |
| Resource Type | Article |
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