ORCID Profile
0000-0002-1484-0532
Current Organisation
Universität Stuttgart
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Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Date: 04-2017
DOI: 10.2514/1.T4898
Publisher: Wiley
Date: 02-2021
DOI: 10.1111/MAPS.13622
Publisher: AIP Publishing
Date: 03-2021
DOI: 10.1063/5.0040801
Abstract: This article describes a novel high frame rate emission spectroscopy setup developed for measurements in high enthalpy flow fields. The optical setup and the associated hardware arrangements are described in detail followed by test case data to demonstrate the capability of recording spectral images at 1 kHz frame rate. The new system is based on a classical Czerny–Turner spectrograph but with a particular setup for high frame rate detection using a Generation II intensifier coupled with a high-speed camera. The high frame rate spectral images acquired enable, for the first time, investigation of the spatial distribution and temporal tracking and evolution of molten droplets of an ablating s le. In this paper, an ex le is shown from ablating meteorite s les tested in a high enthalpy plasma flow field corresponding to a flight scenario at an altitude of 80 km. This new instrumental configuration allows emission spectroscopic analysis of transient phenomena simulated in the high enthalpy ground test facilities with kHz resolution. The particular feature of this system is the ability to measure very faint spectral lines at high temporal and spatial resolution.
Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Date: 07-2016
DOI: 10.2514/1.T4695
Publisher: IOP Publishing
Date: 26-07-2017
Publisher: Springer Science and Business Media LLC
Date: 11-12-2017
Publisher: Springer Science and Business Media LLC
Date: 11-2021
DOI: 10.1007/S12567-021-00396-Y
Abstract: This article presents the full operational experimental capabilities of the plasma wind tunnel facilities at the Institute of Space Systems at the University of Stuttgart. The simulation of the aerothermodynamic environment experienced by vehicles entering the atmosphere of Earth is attempted using three different facilities. Utilizing the three different facilities, the recent improvements enable a unique range of flow conditions in relation to other known facilities. Recent performance optimisations are highlighted in this article. Based on the experimental conditions demonstrated a corresponding flight scenario is derived using a ground-to-flight extrapolation approach based on local mass-specific enthalpy, total pressure and boundary layer edge velocity gradient. This shows that the three facilities cover the challenging parts of the aerothermodynamics along the entry trajectory from Low Earth Orbit. Furthermore, the more challenging conditions arising during interplanetary return at altitudes above 70 km are as well covered.
Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Date: 04-2017
DOI: 10.2514/1.T4787
Publisher: Elsevier BV
Date: 11-2017
No related grants have been discovered for Stefan Loehle.