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Uncertainty Quantification of Expanding High-Enthalpy Air Flows

Oblapenko, Georgii and Hannemann, Volker (2022) Uncertainty Quantification of Expanding High-Enthalpy Air Flows. In: 23rd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics. 23. STAB-DGLR-Symposium 2022, 2022-11-09 - 2022-11-10, Berlin.

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Official URL: https://www.tu.berlin/index.php?id=27890

Abstract

In the present work, we study the sensitivity of expanding hypersonic air flows in the HEG facility with respect to the thermochemical relaxation rates and reservoir conditions, along with the impact of uncertainties in the rates and reservoir conditions on uncertainties of the free-stream parameters. A simplified 1-D formulation of the flow equations is utilized to allow for simultaneous variation of a large number (10) of uncertain parameters. The simulation results show large uncertainties in the vibrational temperature of oxygen and molar fractions of oxygen-containing species, mainly due to uncertainties in the reservoir parameters and data on thermochemical relaxation rates of molecular oxygen.

Item URL in elib:https://elib.dlr.de/190403/
Document Type:Conference or Workshop Item (Speech)
Title:Uncertainty Quantification of Expanding High-Enthalpy Air Flows
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Oblapenko, GeorgiiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hannemann, VolkerUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:November 2022
Journal or Publication Title:23rd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
UNSPECIFIEDSTABUNSPECIFIEDUNSPECIFIED
Status:Published
Keywords:shock tunnel, thermochemical relaxation, numerical simulation, uncertainty quantification, hypersonic flow
Event Title:23. STAB-DGLR-Symposium 2022
Event Location:Berlin
Event Type:international Conference
Event Start Date:9 November 2022
Event End Date:10 November 2022
Organizer:STAB
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Reusable Space Systems and Propulsion Technology
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Hannemann, Dr.rer.nat. Volker
Deposited On:08 Dec 2022 18:07
Last Modified:24 Apr 2024 20:51

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