2022
DOI: 10.48550/arxiv.2205.14207
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A comparison of Fourier and POD mode decomposition methods for high-speed Hall thruster video

Abstract: Hall thrusters are susceptible to large-amplitude plasma oscillations that impact thruster performance and lifetime and are also difficult to model. High-speed cameras are a popular tool to study these dynamics due to their spatial resolution and are a popular, nonintrusive complement to in-situ probes. Highspeed video of thruster oscillations can be isolated (decomposed) into coherent structures (modes) with algorithms that help us better understand the evolution and interactions of each. This work provides a… Show more

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“…Both techniques can provide insightful and complementary results. A recent preprint, reporting on the specific comparison between POD and 2D-FT applied to Hall thruster camera imaging 52 , concludes similarly. Applied to the present datasets, POD shows that the dominant physical structures are m-modes of the form e −iωt−imθ .…”
Section: Comparison Between Pod and 2d Fourier Transformmentioning
confidence: 73%
“…Both techniques can provide insightful and complementary results. A recent preprint, reporting on the specific comparison between POD and 2D-FT applied to Hall thruster camera imaging 52 , concludes similarly. Applied to the present datasets, POD shows that the dominant physical structures are m-modes of the form e −iωt−imθ .…”
Section: Comparison Between Pod and 2d Fourier Transformmentioning
confidence: 73%