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A comparison of the various helicopter mathematical models used in the methodology assessment
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Stephens, Wendell B. |
| Copyright Year | 1988 |
| Description | Various features of the computer codes used in the helicopter industry and by government agencies for rotorcraft aeroelastic stability analysis are compared. Mathematical rigor in modeling rotorcraft is given primarily to the rotor-system dynamic behavior; the aerodynamic modeling is still limited to strip theory and to uneven application of corrections for stall, reversed flow, yawed flow, radial flow, and unsteady aerodynamic effects. The forward-flight regime analysis is included in five of the 11 codes surveyed. However, only two of these codes are capable of a Floquet analysis for aeroelastic stability. For the hover regime, nine of the 11 codes use eigen-analysis approach. The remaining codes perform a harmonic analysis of the transient response of system. |
| File Size | 380251 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19880017765 |
| Archival Resource Key | ark:/13960/t3rv5fq2q |
| Language | English |
| Publisher Date | 1988-06-01 |
| Access Restriction | Open |
| Subject Keyword | Aeronautics (general) Harmonics Reversed Flow Helicopters Unsteady Aerodynamics Performance Prediction Mathematical Models Aerodynamic Stability Aeroelasticity Aerodynamic Stalling Computer Programs Loads Forces Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
