Five hole probe errors caused by fluctuating incidence

Coull, J, Dickens, T, Ng, H ORCID: 0000-0003-4926-7622 and Serna, J (2022) Five hole probe errors caused by fluctuating incidence .

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Abstract

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.

Item Type:	Conference Item (Unspecified)
Uncontrolled Keywords:	4012 Fluid Mechanics and Thermal Engineering, 40 Engineering
Depositing User:	Symplectic Admin
Date Deposited:	19 Jul 2024 15:46
Last Modified:	24 Jan 2026 04:35
DOI:	10.1051/e3sconf/202234501006
Open Access URL:	https://doi.org/10.1051/e3sconf/202234501006
Related Websites:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3183024
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