High frame rate emission spectroscopy for ablation tests in plasma wind tunnel

Ravichandran, Ranjith and Leiser, David and Zander, Fabian ORCID: https://orcid.org/0000-0003-0597-9556 and Loehle, Stefan and Matlovic, Pavol and Toth, Juraj and Ferriere, Ludovic (2021) High frame rate emission spectroscopy for ablation tests in plasma wind tunnel. Review of Scientific Instruments, 92 (3):033101. pp. 1-6. ISSN 0034-6748

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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 sample. In this paper, an example is shown from ablating meteorite samples 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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version embargoed until 1 March 2022 (12 months), in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences (1 Aug 2018 -)
Date Deposited: 27 Oct 2021 05:35
Last Modified: 01 Mar 2022 22:05
Fields of Research (2008): 09 Engineering > 0901 Aerospace Engineering > 090199 Aerospace Engineering not elsewhere classified
Fields of Research (2020): 40 ENGINEERING > 4001 Aerospace engineering > 400199 Aerospace engineering not elsewhere classified
Identification Number or DOI: https://doi.org/10.1063/5.0040801
URI: http://eprints.usq.edu.au/id/eprint/43925

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