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Instability thresholds for flexible rotors in hydrodynamic bearings
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Allaire, P. E. Flack, R. D. |
| Copyright Year | 1980 |
| Description | Two types of fixed pad hydrodynamic bearings (multilobe and pressure dam) were considered. Optimum and nonoptimum geometric configurations were tested. The optimum geometric configurations were determined by using a theoretical analysis and then the bearings were constructed for a flexible rotor test rig. It was found that optimizing bearings using this technique produces a 100% or greater increase in rotor stability. It is shown that this increase in rotor stability is carried out in the absence of certain types of instability mechanisms such as aerodynamic crosscoupling. However, the increase in rotor stability should greatly improve rotating machinery performance in the presence of such forces as well. |
| File Size | 1096345 |
| Page Count | 26 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800021229 |
| Archival Resource Key | ark:/13960/t2799039q |
| Language | English |
| Publisher Date | 1980-01-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Rotary Stability Vibration Resonant Frequencies Rotor Blades Turbomachinery Bearings Hydrodynamics Flexibility Shafts Machine Elements Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
