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Three-dimensional effects in modeling of dual-mode scramjets
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Riggins, D. W. White, J. A. Rodriguez, C. G. |
| Copyright Year | 2000 |
| Description | A numerical investigation of an experimental dual-mode scramjet configuration is performed. Both experimental and numerical results indicate significant upstream interaction for this case. Several computational cases are examined: these include the use of jet-to-jet symmetry and entire half-duct modeling. Grid convergence, turbulence modeling, and wall temperature effects are studied in terms of wall pressure predictions and flow-field characteristics. Wall pressure comparisons between CFD and experiment show fair agreement for the jet-to-jet case. However, further computations of the entire half-duct show the development of a large sidewall separation zone extending much further upstream than the separation zone at the duct centerline. This sidewall separation is the dominant feature in the CFD-generated flowfield but is not evident in the experimental data, resulting in a unfavorable comparison between CFD and experimental data. Current work aimed at resolving this issue and at further understanding asymmetric flow-structures in dual-mode flow-fields is discussed. |
| File Size | 1005344 |
| File Format | |
| Language | English |
| Publisher Date | 2000-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Wall Temperature Ducted Flow Wall Pressure Computational Fluid Dynamics Enthalpy Supersonic Combustion Ramjet Engines Turbulence Models Flow Distribution Flow Characteristics Mathematical Models Computational Grids Jet Propulsion Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
