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Experimental study of the flow field inside a whirling annular seal
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Thames II, H. Davis Morrison, Gerald L. Deotte Jr., Robert E. |
| Copyright Year | 1992 |
| Description | The flow field inside a whirling annular seal was measured using a 3-D Laser Doppler Anemometer (LDA) system. The seal investigated has a clearance of 1.27 mm, a length of 37.3 mm, and is mounted on a drive shaft with a 50 percent eccentricity ratio. This results in the rotor whirling at the same speed as the shaft rotation (whirl ratio = 1.0). The seal is operated at Reynolds number of 12,000 and a Taylor number of 6,300 (3,600 rpm). The 3-D LDA system is equipped with a rotary encoding system which is used to produce phase averaged measurements of the entire mean velocity vector field and Reynolds stress tensor field from 0.13 mm upstream to 0.13 mm downstream of the seal. The mean velocity field reveals a highly three dimensional flow field with large radial velocities near the inlet of the seal as well as a recirculation zone on the rotor surface. The location of maximum mean axial velocity migrates from the pressure side of the rotor at the inlet to the suction side at turbulence kinetic energy. However, turbulence production and dissipation attain equilibrium fairly quickly with remaining relatively constant over the last half of the seal. |
| File Size | 604463 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930001704 |
| Archival Resource Key | ark:/13960/t3xt0mr8f |
| Language | English |
| Publisher Date | 1992-09-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Stress Tensors Turbulence Turbulent Flow Laser Doppler Velocimeters Eccentricity Rotors Velocity Distribution Annular Flow Laser Anemometers Rotating Shafts Reynolds Stress Seals Stoppers Flow Distribution Flow Velocity Radial Velocity Recirculative Fluid Flow Kinetic Energy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
