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Uncertainty Quantification of Kiel Probes for RDC Applications

Bach, Eric and Bhavraj, S. Thethy and Edgington-Mitchell, Daniel and Rezay Haghdoost, Mohammad and Oberleithner, Kilian and Paschereit, C. O. and Stathopoulos, Panagiotis and Bohon, Myles D. (2021) Uncertainty Quantification of Kiel Probes for RDC Applications. AIAA Sci-Tech, Virtual Event. doi: 10.2514/6.2021-0293.

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Official URL: https://arc.aiaa.org/doi/10.2514/6.2021-0293

Abstract

Kiel probes have the potential to be a versatile tool for determining stagnation pressure gain in rotating detonation combustors (RDCs). Although average pressure gain values determined with Kiel probes are comparable to those from thrust stand experiments, one can expect several interferences from the probe in unsteady trans- and supersonic flow. This work investigates the response of a Kiel probe to highly unsteady flow, similar to that in an RDC. The probe is subjected to an underexpanded starting jet behind an incident shock with Mach numbers of 1.6 to 2.7, emanating from a shock tube with a reservoir ratio of about 394. The incidence angle of the probe is varied between 0° and 90°, as is the probe’s axial location with respect to the tube’s exit plane. High-speed schlieren images reveal the Mach number of the moving shock wave and the structure of the detached bow shock at the Kiel head, which is similar to that of a bluff body. It is shown that the measured stagnation pressure signal is independent of inflow angle over a range of 45°, and that signal attenuation is caused by gas processing through the bow shock and viscous losses in the probe’s capillary. Moving the probe downstream of the shock tube’s exit plane causes a 7% reduction in the measured stagnation pressure, due to the expansion process. The frequency response of the Kiel probe to sinusoidal, small-amplitude pressure fluctuations is determined up to 5600 Hz, confirming that no unwanted Helmholtz resonance is present in the probe. A Berg-Tijdeman representation delivers amplitude ratio and phase lag of comparable magnitude.

Item URL in elib:https://elib.dlr.de/147771/
Document Type:Conference or Workshop Item (Lecture)
Title:Uncertainty Quantification of Kiel Probes for RDC Applications
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bach, EricChair of Pressure Gain Combustion, Technische Universität BerlinUNSPECIFIED
Bhavraj, S. ThethyMonash UniversityUNSPECIFIED
Edgington-Mitchell, DanielUNSPECIFIEDUNSPECIFIED
Rezay Haghdoost, MohammadUNSPECIFIEDUNSPECIFIED
Oberleithner, KilianChair of Fluid Dynamics, Hermann-Föttinger-Institut, TU Berlin, GermanyUNSPECIFIED
Paschereit, C. O.Institut für Strömungsmechanik und Technische Akustik, TU-BerlinUNSPECIFIED
Stathopoulos, PanagiotisChair of Fluid Dynamics (Herman-Föettinger-Institut), Technische Universität Berlin, GermanyUNSPECIFIED
Bohon, Myles D.Chair of Pressure Gain Combustion, Technische Universität BerlinUNSPECIFIED
Date:17 December 2021
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2021-0293
Status:Published
Keywords:Kiel Probes; Rotating detonation combustion; Measurement uncertainty
Event Title:AIAA Sci-Tech
Event Location:Virtual Event
Event Type:international Conference
HGF - Research field:Energy
HGF - Program:Energy System Design
HGF - Program Themes:Digitalization and System Technology
DLR - Research area:Energy
DLR - Program:E SY - Energy System Technology and Analysis
DLR - Research theme (Project):E - Energy System Technology, E - Gas Turbine
Location: Cottbus
Institutes and Institutions:Institute of Low-Carbon Industrial Processes
Deposited By: Stathopoulos, Panagiotis
Deposited On:17 Dec 2021 17:02
Last Modified:21 Dec 2021 13:02

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