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Test results for rotordynamic coefficients of the ssme hpotp turbine interstage seal with two swirl brakes
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ramsey, Christopher Childs, Dara W. Baskharone, Erian |
| Copyright Year | 1991 |
| Description | Test results are presented for the HPOTP Turbine Interstage Seal with both the current and an alternate, aerodynamically designed, swirl brake. Tests were conducted at speeds out to 16,000 rpm, supply pressures up to 18.3 bars, and the following three inlet tangential velocity conditions: (1) no preswirl; (2) intermediate preswirl in the direction of rotation; and (3) high preswirl in the direction of rotation. The back pressure can be controlled independently and was varied to yield the following four pressure ratios: 0.4, 0.45, 0.56, and 0.67. The central and simplest conclusion to be obtained from the test series is that the alternate swirl brake consistently outperforms the current swirl brake in terms of stability performance. The alternate swirl brake's whirl frequency ratio was generally about one half or less than corresponding values for the current design. In many cases, the alternate design yielded negative whirl frequency ratio values in comparison to positive values for the current design. The alternate design can be directly substituted into the space currently occupied by the current design. There is no change in leakage performance. |
| File Size | 574107 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920005139 |
| Archival Resource Key | ark:/13960/t1fj7cd44 |
| Language | English |
| Publisher Date | 1991-10-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Leakage Brakes for Arresting Motion High Pressure Oxygen Turbine Wheels Rotating Bodies Rotor Aerodynamics Rotation Pump Seals Displacement Rotor Dynamics Turbine Pumps Vibration Damping Space Shuttle Main Engine Pressure Ratio Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
