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Compressibility considerations for kappa-omega turbulence models in hypersonic boundary layer applications
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Rumsey, C. L. |
| Copyright Year | 2009 |
| Description | The ability of kappa-omega models to predict compressible turbulent skin friction in hypersonic boundary layers is investigated. Although uncorrected two-equation models can agree well with correlations for hot-wall cases, they tend to perform progressively worse - particularly for cold walls - as the Mach number is increased in the hypersonic regime. Simple algebraic models such as Baldwin-Lomax perform better compared to experiments and correlations in these circumstances. Many of the compressibility corrections described in the literature are summarized here. These include corrections that have only a small influence for kappa-omega models, or that apply only in specific circumstances. The most widely-used general corrections were designed for use with jet or mixing-layer free shear flows. A less well-known dilatation-dissipation correction intended for boundary layer flows is also tested, and is shown to agree reasonably well with the Baldwin-Lomax model at cold-wall conditions. It exhibits a less dramatic influence than the free shear type of correction. There is clearly a need for improved understanding and better overall physical modeling for turbulence models applied to hypersonic boundary layer flows. |
| File Size | 2695481 |
| Page Count | 34 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20090015399 |
| Archival Resource Key | ark:/13960/t0gv0kj1f |
| Language | English |
| Publisher Date | 2009-04-01 |
| Access Restriction | Open |
| Subject Keyword | Aeronautics (general) Correlation Jet Mixing Flow Compressibility Computational Fluid Dynamics Skin Friction Shear Flow Mathematical Models Free Flow Correction Walls Mixing Layers Fluids Boundary Layer Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
