| タイトル | Analysis of eccentric annular incompressible seals. I - A new solution using fast Fourier transforms for determining hydrodynamic force |
| 著者（英） | Nelson, C. C.; Nguyen, D. T. |
| 著者所属（英） | Texas A&M Univ. |
| 発行日 | 1987-10-01 |
| 言語 | eng |
| 内容記述 | A new analysis procedure is presented which solves for the flow variables of an incompressible-flow annular pressure seal in which the rotor has a large static displacement from the centered position. The analysis begins with a set of governing equations based on a turbulent bulk-flow model and Moody's friction equation. No simplification of these bulk-flow equations is required for the solution procedure. Perturbation of the flow variables yields a set of zeroth and first-order equations. The zeroth-order equations (which model the large static displacement) are integrated by means of an efficient new method which employs fast Fourier transforms. Further integration of the zeroth-order pressures yields the hydrodynamic reactive force. Predictions for the hydrodynamic forces from this analysis procedure are in excellent agreement with available experimental results. |
| NASA分類 | MECHANICAL ENGINEERING |
| レポートNO | 88A23308
ASME PAPER 87-TRIB-52 |
| 権利 | Copyright |
