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Rotordynamic coefficients and leakage flow of parallel grooved seals and smooth seals
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Florjancic, S. Dietzen, F. J. Janson, W. Nordmann, R. Frei, A. |
| Copyright Year | 1987 |
| Description | Based on Childs finite length solution for annular plain seals an extension of the bulk flow theory is derived to calculate the rotordynamic coefficients and the leakage flow of seals with parallel grooves in the stator. Hirs turbulent lubricant equations are modified to account for the different friction factors in circumferential and axial direction. Furthermore an average groove depth is introduced to consider the additional circumferential flow in the grooves. Theoretical and experimental results are compared for the smooth constant clearance seal and the corresponding seal with parallel grooves. Compared to the smooth seal the direct and cross-coupled stiffness coefficients as well as the direct damping coefficients are lower in the grooved seal configuration. Leakage is reduced by the grooving pattern. |
| File Size | 938815 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870012773 |
| Archival Resource Key | ark:/13960/t27992d3p |
| Language | English |
| Publisher Date | 1987-01-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Leakage Seals Stoppers Cross Coupling Vibration Damping Rotors Stators Aerodynamic Coefficients Stiffness Grooves Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
