One-dimensional Interferometric Scattering Velocimetry for High-speed Flows

Yedhu Krishna, Anbarasan Sekar, Gaetano Magnotti, Aravind Vaidyanathan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Interferometric Rayleigh scattering is an optical diagnostic technique that can be used to measure flow velocity in high-speed flows. Conventionally, the technique collects Rayleigh scattered light from a gas sample and passes it through a Fabry-Perot etalon to generate interference fringes on a camera. When the gas velocity increases, the Doppler shift in the scattered light introduces a shift in the spatial location of fringes and the flow velocity is estimated from this shift by a wavelength calibration of the camera pixels. Recently, the technique was extended to one-dimensional measurements by using a virtually imaged phased array instead of a Fabry-Perot etalon. The current work extends the application of such a one-dimensional interferometric system to seeded high-speed flows which makes the system work with much lower laser power, and discusses the details regarding the optimization of the system for high-speed flow applications.
Original languageEnglish (US)
Title of host publication25th AIAA International Space Planes and Hypersonic Systems and Technologies Conference
PublisherAmerican Institute of Aeronautics and Astronautics
DOIs
StatePublished - May 27 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-06-06

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