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Calibration of pneumatic multi-hole probes for transonic turbomachinery flows

Bachner, Johannes Ricco and Pahs, Andreas and Weggler, Philipp and Kocian, Frank and Rößling, Marcel (2022) Calibration of pneumatic multi-hole probes for transonic turbomachinery flows. CEAS Aeronautical Journal. Springer. doi: 10.1007/s13272-022-00606-1. ISSN 1869-5590.

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Official URL: https://link.springer.com/content/pdf/10.1007/s13272-022-00606-1.pdf.


The calibration data of a five-hole probe and a six-hole probe designed for measurements in transonic turbomachinery flows are presented. The probes feature a special base pressure hole on the back side to avoid the Mach number insensitivity of pressure probes near Mach number unity. There is only little literature available on the performance of such probes, especially in flows with large radial flow angles. To close this gap, the probes are calibrated for radial flow angles up to 32 degrees. A significant influence of this flow angle on the coefficients used for Mach number determination is shown. At large positive flow angles, the relationship between the pressure coefficient using the base pressure and the Mach number is not biunique for the six-hole probe. Therefore, an experimental study of Mach number measurement deviations is performed at the calibration wind tunnel. Different evaluation methods are examined. The sample standard deviation over 210 randomly distributed points is reduced by 66% compared to the same probe design without the base pressure hole. This is achieved using two calibration coefficients for the Mach number simultaneously in a multidimensional interpolation.

Item URL in elib:https://elib.dlr.de/188108/
Document Type:Article
Title:Calibration of pneumatic multi-hole probes for transonic turbomachinery flows
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Bachner, Johannes RiccoUNSPECIFIEDhttps://orcid.org/0000-0002-3041-5421UNSPECIFIED
Weggler, PhilippUNSPECIFIEDhttps://orcid.org/0000-0003-3685-8263UNSPECIFIED
Date:29 August 2022
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Five-hole probe, Pneumatic probe, Transonic flow measurement, Turbomachinery measurement
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Aircraft and  Validation, E - Gas Turbine
Location: Göttingen
Institutes and Institutions:Institute of Propulsion Technology > Turbine
Deposited By: Bachner, Johannes Ricco
Deposited On:05 Sep 2022 15:24
Last Modified:05 Sep 2022 15:24

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