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The Behaviour of Probes in Transonic Flowfields of Turbomachinery

Kost, Friedrich (2009) The Behaviour of Probes in Transonic Flowfields of Turbomachinery. 8th European Conference on Turbomachinery - Fluid Dynamics and Thermodynamics., 2009-03-23 - 2009-03-27, Graz, Austria.

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Abstract

It is known that a constraint exists for probes in transonic flow which leads to an insensitivity to static pressure at Mach number unity. Nearby that Mach number different types of probes are affected more or less by the reduced sensitivity to static pressure or Mach number. In transonic flow the combined disturbance of probe head and stem extends the insensitivity range up to a Mach number of 1.3. Some probes even show a non- monotonic relation of probe coefficient to Mach number which makes it impossible to determine the flow Mach number at all. A closer look onto the pressure distribution of a blunt body reveals that only the front part of a probe is subject to the transonic constraint while base pressure is not affected. Therefore a new probe was designed where a base pressure tapping was added to a conventional probe with radial stem.

Item URL in elib:https://elib.dlr.de/57458/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:The Behaviour of Probes in Transonic Flowfields of Turbomachinery
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kost, FriedrichUNSPECIFIEDUNSPECIFIED
Date:23 March 2009
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Probe, Pneumatic probe, Transonic flow, Turbomachines
Event Title:8th European Conference on Turbomachinery - Fluid Dynamics and Thermodynamics.
Event Location:Graz, Austria
Event Type:international Conference
Event Dates:2009-03-23 - 2009-03-27
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old)
Location: Göttingen
Institutes and Institutions:Institute of Propulsion Technology > Turbine
Deposited By: Kost, Dr.rer.nat. Friedrich
Deposited On:19 Jan 2009
Last Modified:31 Jul 2019 19:24

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