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Rotordynamic feasibility of a conceptual variable-speed power turbine propulsion system for large civil tilt-rotor applications
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Howard, Samuel |
| Copyright Year | 2012 |
| Description | A variable-speed power turbine concept is analyzed for rotordynamic feasibility in a Large Civil Tilt-Rotor (LCTR) class engine. Implementation of a variable-speed power turbine in a rotorcraft engine would enable high efficiency propulsion at the high forward velocities anticipated of large tilt-rotor vehicles. Therefore, rotordynamics is a critical issue for this engine concept. A preliminary feasibility study is presented herein to address this concern and identify if variable-speed is possible in a conceptual engine sized for the LCTR. The analysis considers critical speed placement in the operating speed envelope, stability analysis up to the maximum anticipated operating speed, and potential unbalance response amplitudes to determine that a variable-speed power turbine is likely to be challenging, but not impossible to achieve in a tilt-rotor propulsion engine. |
| File Size | 1844304 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120008790 |
| Archival Resource Key | ark:/13960/t6wx2cr5d |
| Language | English |
| Publisher Date | 2012-05-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Rotor Dynamics Tilt Rotor Aircraft Civil Aviation Gears Engine Design Speed Control Rotary Wing Aircraft Aircraft Engines General Aviation Aircraft Turbine Engines Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
