Experimental study of flows in a two-dimensional inlet model
| Autor: | Miklos Sajben, Thomas J. Bogar, Joseph C. Kroutil |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
Overall pressure ratio
Physics geography geography.geographical_feature_category Shock (fluid dynamics) Meteorology Mechanical Engineering Aerospace Engineering Static pressure Mechanics Inlet Throttle Physics::Fluid Dynamics Cross section (physics) symbols.namesake Flow separation Flow conditions Fuel Technology Mach number Space and Planetary Science symbols Two-dimensional flow Freestream |
| Zdroj: | Journal of Propulsion and Power. 1:109-117 |
| ISSN: | 1533-3876 0748-4658 |
| DOI: | 10.2514/3.22767 |
| Popis: | Experimental results are reported for flows in a ramp-type, external-compression inlet with a rectangular, large-aspect-ratio cross section, at a freestream Mach number of 1.84. Variation of the exit throttle area created a wide range of operating conditions, from highly supercritical to fully subsonic internal flows with a detached shock ahead of the ramp lip. Both time-mean and dynamic aspects of the flows were investigated. At high terminal-shock Mach numbers (1.5-2.2), three different, massively separated, subsonic flow patterns were found, which depended on throttle setting and the history of prior flow conditions. A specific pressure ratio could be associated with at least two such patterns. At low pressure ratios, the terminal shock was weak and strongly influenced by the ramp/cowl configuration. The presence of leading edges is believed to have been closely involved in the large-amplitude, periodic oscillations (buzz) observed at the low end of the pressure-ratio range. |
| Databáze: | OpenAIRE |
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