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Energetic characterization of Martian atmospheric flow in the arc-heated wind tunnel L2K using experimental and numerical methods

Lantelme, Melissa (2020) Energetic characterization of Martian atmospheric flow in the arc-heated wind tunnel L2K using experimental and numerical methods. Master's, Karlsruhe Institute of Technology.

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Abstract

This Master’s thesis focuses on the analysis of the hypersonic flow in the arc heated wind tunnel L2K at the German Aerospace Center (DLR) in Cologne. The flow field in the wind tunnel is studied numerically using the DLR’s CFD solver TAU and experimentally using invasive measurement techniques to determine the pitot pressure and heat flux on several models. The high enthalpy flow for Martian atmosphere, including mainly CO2 and N2, is studied in respect to the chemical non-equilibrium conditions. Two flow conditions have been defined as ESA’s post flight analysis for the ExoMars mission to use for code validation purposes. All experiments and simulations are performed the two flow conditions at two positions in the wind tunnel resulting in a total of four different flow configurations for the six models respectively. A sphere, a cylinder which is orientated orthogonal to the flow direction and a cylinder which is orientated in parallel are available in two sizes respectively. The findings are furthermore compared to theoretical theorems for the cold wall heat flux in the stagnation point and the shock stand-off distance. Overall the numerical and experimental results for heat flux and pitot pressure coincide, expect for one flow configuration. This is discussed in more detail in the thesis.

Item URL in elib:https://elib.dlr.de/140474/
Document Type:Thesis (Master's)
Title:Energetic characterization of Martian atmospheric flow in the arc-heated wind tunnel L2K using experimental and numerical methods
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lantelme, MelissaUNSPECIFIEDUNSPECIFIED
Date:February 2020
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:116
Status:Unpublished
Keywords:Martian atmosphere, atmospheric entry, hypersonic flow, high enthalpy, chemical non-equilibrium, numerical simulation, heat flux measurements
Institution:Karlsruhe Institute of Technology
Department:Institute of Fluid Mechanics
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 - Wiederverwendbare Raumfahrtsysteme (old)
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonoc and Hypersonic Technology
Deposited By: Esser, Dr.-Ing. Burkard
Deposited On:15 Jan 2021 13:42
Last Modified:15 Jan 2021 13:42

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