Bidirectional Brush Seals – Post-Test Analysis
A post-test analysis of a set of inside-diameter/outside-diameter (ID/OD) bidirectional brush seals used in three-port wave rotor tests was undertaken to determine brush bristle and configuration wear, pullout, and rotor coating wear. The results suggest that sharp changes in the pressure profiles w...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
1999-01-01
|
| Series: | International Journal of Rotating Machinery |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S1023621X99000159 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832567059982057472 |
|---|---|
| author | Robert C. Hendricks Jack Wilson Tom Y. Wu Ralph Flower Robert L. Mullen |
| author_facet | Robert C. Hendricks Jack Wilson Tom Y. Wu Ralph Flower Robert L. Mullen |
| author_sort | Robert C. Hendricks |
| collection | DOAJ |
| description | A post-test analysis of a set of inside-diameter/outside-diameter (ID/OD) bidirectional brush seals used in three-port wave rotor tests was undertaken to determine brush bristle and configuration wear, pullout, and rotor coating wear. The results suggest that sharp changes in the pressure profiles were not well reflected in bristle tip configuration patterns or wear. Also, positive-to-negative changes in axial pressure gradients appeared to have little effect on the backing plates. Although the brushes had similar porosities, they had very different unpacked arrays. This difference could explain the departure of experimental data from computational fluid dynamics flow predictions for well-packed arrays at higher pressure drops. The rotor wear led to “car track” scars (upper and lower wear bands) with a whipped surface between the bands. Those bands may have resulted from bristle stiffening at the fence and gap plates during alternate portions of the rotor cycle. Within the bristle response range the wear surface reflected the pressure distribution effect on bristle motion. No sacrificial metallurgical data were taken. The bristles did wear, with correspondingly more wear on the
ID brush configurations than on the OD configurations; the complexity in constructing the
ID brush was a factor. |
| format | Article |
| id | doaj-art-c992d3188be044a6b26cf2b853d0c9cf |
| institution | Kabale University |
| issn | 1023-621X |
| language | English |
| publishDate | 1999-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-c992d3188be044a6b26cf2b853d0c9cf2025-02-03T01:02:26ZengWileyInternational Journal of Rotating Machinery1023-621X1999-01-015316718010.1155/S1023621X99000159Bidirectional Brush Seals – Post-Test AnalysisRobert C. Hendricks0Jack Wilson1Tom Y. Wu2Ralph Flower3Robert L. Mullen4National Aeronautics and Space Administration, Lewis Research Center, Cleveland 44135, OH, USANYMA, Inc., Brook Park 44135, OH, USANational Aeronautics and Space Administration, Lewis Research Center, Cleveland 44135, OH, USACross Manufacturing Ltd., Devizes, UKCase Western Reserve University, Cleveland 44106, OH, USAA post-test analysis of a set of inside-diameter/outside-diameter (ID/OD) bidirectional brush seals used in three-port wave rotor tests was undertaken to determine brush bristle and configuration wear, pullout, and rotor coating wear. The results suggest that sharp changes in the pressure profiles were not well reflected in bristle tip configuration patterns or wear. Also, positive-to-negative changes in axial pressure gradients appeared to have little effect on the backing plates. Although the brushes had similar porosities, they had very different unpacked arrays. This difference could explain the departure of experimental data from computational fluid dynamics flow predictions for well-packed arrays at higher pressure drops. The rotor wear led to “car track” scars (upper and lower wear bands) with a whipped surface between the bands. Those bands may have resulted from bristle stiffening at the fence and gap plates during alternate portions of the rotor cycle. Within the bristle response range the wear surface reflected the pressure distribution effect on bristle motion. No sacrificial metallurgical data were taken. The bristles did wear, with correspondingly more wear on the ID brush configurations than on the OD configurations; the complexity in constructing the ID brush was a factor.http://dx.doi.org/10.1155/S1023621X99000159Brush sealsWearPorous mediaTribologyCFDWave rotor. |
| spellingShingle | Robert C. Hendricks Jack Wilson Tom Y. Wu Ralph Flower Robert L. Mullen Bidirectional Brush Seals – Post-Test Analysis International Journal of Rotating Machinery Brush seals Wear Porous media Tribology CFD Wave rotor. |
| title | Bidirectional Brush Seals – Post-Test Analysis |
| title_full | Bidirectional Brush Seals – Post-Test Analysis |
| title_fullStr | Bidirectional Brush Seals – Post-Test Analysis |
| title_full_unstemmed | Bidirectional Brush Seals – Post-Test Analysis |
| title_short | Bidirectional Brush Seals – Post-Test Analysis |
| title_sort | bidirectional brush seals post test analysis |
| topic | Brush seals Wear Porous media Tribology CFD Wave rotor. |
| url | http://dx.doi.org/10.1155/S1023621X99000159 |
| work_keys_str_mv | AT robertchendricks bidirectionalbrushsealsposttestanalysis AT jackwilson bidirectionalbrushsealsposttestanalysis AT tomywu bidirectionalbrushsealsposttestanalysis AT ralphflower bidirectionalbrushsealsposttestanalysis AT robertlmullen bidirectionalbrushsealsposttestanalysis |