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Undulated nozzle for enhanced exit area mixing
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 2000 |
| Description | A nozzle having an undulating surface for enhancing the mixing of a primary flow with a secondary flow or ambient air, without requiring an ejector. The nozzle includes a nozzle structure and design for introducing counter-rotating vorticity into the primary flow either through (i) internal surface corrugations where an axisymmetric line through each corrugation is coincident with an axisymmetric line through the center of the flow passageway or (ii) through one or more sets of alternating convexities and cavities in the internal surface of the nozzle where an axisymmetric line through each convexity and cavity is coincident with an axisymmetric line through the center of the flow passageway, and where the convexities contract from the entrance end towards the exit end. Exit area mixing is also enhanced by one or more chevrons attached to the exit edge of the nozzle. The nozzle is ideally suited for application as a jet engine nozzle. When used as a jet engine nozzle, noise suppression with simultaneous thrust augmentation/minimal thrust loss is achieved. |
| File Size | 1426945 |
| File Format | |
| Language | English |
| Publisher Date | 2000-07-04 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Nozzle Geometry Patents Nozzle Design Engine Noise Fluid Flow Convergent-divergent Nozzles Jet Engines Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
