Flow visualization and leakage measurements of worn labyrinth seals /
A large-scale flow visualization test facility is used to
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1997.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | A large-scale flow visualization test facility is used to adjustable seal elements, constructed from plexiglass, and rub-grooves in the opposing surface. Two flow Another important effect is the presence of large, highspeed approaches the tooth clearance. If rub-groove penetration at a large angle, giving a larger vena contracts velocity. cases, a geometry with a rub-groove performed worse than its conduct an experimental investigation into the leakage contribute to the performance of a seal. One effect is design, using water as the working fluid. Externally determines if the throughflow directly approaches the distances. For all small clearance geometries, the downstream tooth, leading to carry-over, or if it approaches extracted and enhanced using a computer. Both worn and greater turbulence. In nearly all cases, a geometry with labyrinth cavity is sometimes altered. The throughflow labyrinth chamber. At larger clearances, other effects numbers, step heights, clearances, and axial offset occurs, the throughflow trajectory angle into the downstream of the rub-groove. outweighs most throughflow trajectory effects in the patterns in the labyrinth seal, and selected images are Plexiglass attachments are used to simulate worn teeth tips recirculation zones in the labyrinth cavity, which lead to resistance and flow characteristics of worn labyrinth seals. resistance coefficient is decreased by increasing the width seal, caused by the vena contracts as the throughflow simulate both straight-through and stepped labyrinth seals. teeth. Similarly, for nearly all medium and large clearance the rotating and stationary components of the seal, due to thermal expansion, centrifugal growth, and rotordynamic throughflow "pinching" effect, which causes a high speed throughflow and increased turbulence dissipation, heavily throughflow penetration into the rub-groove cavity of a worn trajectory angle is another important effect, because it unworn counterpart. Finally, in general, a seal's leakage unworn labyrinth seals are tested over a range of Reynolds unworn teeth tips, due to the nozzling effect of the worn vibration. The test facility is a large-scale, 2-D planar visualization methods are used to digitally record flow Wear in labyrinth seals is a consequence of contact between worn teeth tips performs worse than its counterpart with |
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| Item Description: | "Major subject: Mechanical Engineering". Vita. |
| Physical Description: | xiv, 127 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |