Five hole probe errors caused by fluctuating incidence
Steady multi-hole pressure probes are used extensively in turbomachinery research. While various sources of error are known, this paper demonstrates that fluctuations in probe incidence can be particularly damaging for accuracy. A simple, quasi-steady model of five-hole-probe response explains why a...
| Main Authors: | , , , |
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| Format: | Conference item |
| Language: | English |
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EDP Sciences
2022
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| _version_ | 1797111611216887808 |
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| author | Coull, J Dickens, T Ng, H Serna, J |
| author_facet | Coull, J Dickens, T Ng, H Serna, J |
| author_sort | Coull, J |
| collection | OXFORD |
| description | Steady multi-hole pressure probes are used extensively in turbomachinery research. While various sources of error are known, this paper demonstrates that fluctuations in probe incidence can be particularly damaging for accuracy. A simple, quasi-steady model of five-hole-probe response explains why angle fluctuations can cause large errors in the indicated total and static pressure. The model explains why measurements in a shedding wake over-estimated loss by 40%. Simulated traverses behind rotors show similar behavior: fluctuating incidence causes efficiency to be under-estimated by over 1% in some cases. The model can correct five-hole-probe errors using an estimate of unsteady flow angles. This approach reduces errors by an order of magnitude and can be used to post-correct existing test data. |
| first_indexed | 2024-03-07T08:11:19Z |
| format | Conference item |
| id | oxford-uuid:91b84f39-5d39-4fbd-a1c3-96eb7de33853 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T08:11:19Z |
| publishDate | 2022 |
| publisher | EDP Sciences |
| record_format | dspace |
| spelling | oxford-uuid:91b84f39-5d39-4fbd-a1c3-96eb7de338532023-11-29T15:04:11ZFive hole probe errors caused by fluctuating incidenceConference itemhttp://purl.org/coar/resource_type/c_5794uuid:91b84f39-5d39-4fbd-a1c3-96eb7de33853EnglishSymplectic ElementsEDP Sciences2022Coull, JDickens, TNg, HSerna, JSteady multi-hole pressure probes are used extensively in turbomachinery research. While various sources of error are known, this paper demonstrates that fluctuations in probe incidence can be particularly damaging for accuracy. A simple, quasi-steady model of five-hole-probe response explains why angle fluctuations can cause large errors in the indicated total and static pressure. The model explains why measurements in a shedding wake over-estimated loss by 40%. Simulated traverses behind rotors show similar behavior: fluctuating incidence causes efficiency to be under-estimated by over 1% in some cases. The model can correct five-hole-probe errors using an estimate of unsteady flow angles. This approach reduces errors by an order of magnitude and can be used to post-correct existing test data. |
| spellingShingle | Coull, J Dickens, T Ng, H Serna, J Five hole probe errors caused by fluctuating incidence |
| title | Five hole probe errors caused by fluctuating incidence |
| title_full | Five hole probe errors caused by fluctuating incidence |
| title_fullStr | Five hole probe errors caused by fluctuating incidence |
| title_full_unstemmed | Five hole probe errors caused by fluctuating incidence |
| title_short | Five hole probe errors caused by fluctuating incidence |
| title_sort | five hole probe errors caused by fluctuating incidence |
| work_keys_str_mv | AT coullj fiveholeprobeerrorscausedbyfluctuatingincidence AT dickenst fiveholeprobeerrorscausedbyfluctuatingincidence AT ngh fiveholeprobeerrorscausedbyfluctuatingincidence AT sernaj fiveholeprobeerrorscausedbyfluctuatingincidence |