A Time Efficient Adaptive Gridding Approach and Improved Calibrations in Five-Hole Probe Measurements
Five-Hole Probes (FHP), being a dependable and accurate aerodynamic tool, are an excellent choice for measuring three-dimensional flow fields in turbomachinery. To improve spatial resolution, a subminiature FHP with a diameter of 1.68 mm is employed. High length to diameter ratio of the tubing and m...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
|
| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2015/376967 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832566929614700544 |
|---|---|
| author | Jason Town Cengiz Camci |
| author_facet | Jason Town Cengiz Camci |
| author_sort | Jason Town |
| collection | DOAJ |
| description | Five-Hole Probes (FHP), being a dependable and accurate aerodynamic tool, are an excellent choice for measuring three-dimensional flow fields in turbomachinery. To improve spatial resolution, a subminiature FHP with a diameter of 1.68 mm is employed. High length to diameter ratio of the tubing and manual pitch and yaw calibration cause increased uncertainty. A new FHP calibrator is designed and built to reduce the uncertainty by precise, computer controlled movements and reduced calibration time. The calibrated FHP is then placed downstream of the nozzle guide vane (NGV) assembly of a low-speed, large-scale, axial flow turbine. The cold flow HP turbine stage contains 29 vanes and 36 blades. A fast and computer controllable traversing system is implemented using an adaptive grid method for the refinement of measurements in regions such as vane wake, secondary flows, and boundary layers. The current approach increases the possible number of measurement points in a two-hour period by 160%. Flow structures behind the NGV measurement plane are identified with high spatial resolution and reduced uncertainty. The automated pitch and yaw calibration and the adaptive grid approach introduced in this study are shown to be a highly effective way of measuring complex flow fields in the research turbine. |
| format | Article |
| id | doaj-art-ec73a2a1173a4b108667ef4094605a09 |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-ec73a2a1173a4b108667ef4094605a092025-02-03T01:02:55ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342015-01-01201510.1155/2015/376967376967A Time Efficient Adaptive Gridding Approach and Improved Calibrations in Five-Hole Probe MeasurementsJason Town0Cengiz Camci1Turbomachinery Aero-Heat Transfer Laboratory, Department of Aerospace Engineering, The Pennsylvania State University, University Park, PA 16802, USATurbomachinery Aero-Heat Transfer Laboratory, Department of Aerospace Engineering, The Pennsylvania State University, University Park, PA 16802, USAFive-Hole Probes (FHP), being a dependable and accurate aerodynamic tool, are an excellent choice for measuring three-dimensional flow fields in turbomachinery. To improve spatial resolution, a subminiature FHP with a diameter of 1.68 mm is employed. High length to diameter ratio of the tubing and manual pitch and yaw calibration cause increased uncertainty. A new FHP calibrator is designed and built to reduce the uncertainty by precise, computer controlled movements and reduced calibration time. The calibrated FHP is then placed downstream of the nozzle guide vane (NGV) assembly of a low-speed, large-scale, axial flow turbine. The cold flow HP turbine stage contains 29 vanes and 36 blades. A fast and computer controllable traversing system is implemented using an adaptive grid method for the refinement of measurements in regions such as vane wake, secondary flows, and boundary layers. The current approach increases the possible number of measurement points in a two-hour period by 160%. Flow structures behind the NGV measurement plane are identified with high spatial resolution and reduced uncertainty. The automated pitch and yaw calibration and the adaptive grid approach introduced in this study are shown to be a highly effective way of measuring complex flow fields in the research turbine.http://dx.doi.org/10.1155/2015/376967 |
| spellingShingle | Jason Town Cengiz Camci A Time Efficient Adaptive Gridding Approach and Improved Calibrations in Five-Hole Probe Measurements International Journal of Rotating Machinery |
| title | A Time Efficient Adaptive Gridding Approach and Improved Calibrations in Five-Hole Probe Measurements |
| title_full | A Time Efficient Adaptive Gridding Approach and Improved Calibrations in Five-Hole Probe Measurements |
| title_fullStr | A Time Efficient Adaptive Gridding Approach and Improved Calibrations in Five-Hole Probe Measurements |
| title_full_unstemmed | A Time Efficient Adaptive Gridding Approach and Improved Calibrations in Five-Hole Probe Measurements |
| title_short | A Time Efficient Adaptive Gridding Approach and Improved Calibrations in Five-Hole Probe Measurements |
| title_sort | time efficient adaptive gridding approach and improved calibrations in five hole probe measurements |
| url | http://dx.doi.org/10.1155/2015/376967 |
| work_keys_str_mv | AT jasontown atimeefficientadaptivegriddingapproachandimprovedcalibrationsinfiveholeprobemeasurements AT cengizcamci atimeefficientadaptivegriddingapproachandimprovedcalibrationsinfiveholeprobemeasurements AT jasontown timeefficientadaptivegriddingapproachandimprovedcalibrationsinfiveholeprobemeasurements AT cengizcamci timeefficientadaptivegriddingapproachandimprovedcalibrationsinfiveholeprobemeasurements |