Tomography system for measurement of gas properties in combustion flow field

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Abstract

This paper describes a self-designed fiber-coupled tomography system and its application in combustion diagnostics. The tomographic technique, which combines tunable diode laser spectroscopy and algebraic reconstruction technique, enables the simultaneous reconstruction of temperature and gas concentration with both spatial and temporal resolutions. The system measures a maximum diameter of 35 cm in a circular area with a minimum spatial resolution of 1 mm × 1 mm and temporal response of up to 1 kHz. Simulations validate the effects of the beam arrangement and discrete grid on reconstruction accuracy, and give the optimal beam arrangements. Experiments are made to demonstrate the tomography method, and systems are constructed in laboratory and on engineering test benches.

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SONG, J., HONG, Y., XIN, M., WANG, G., & LIU, Z. (2017). Tomography system for measurement of gas properties in combustion flow field. Chinese Journal of Aeronautics, 30(5), 1697–1707. https://doi.org/10.1016/j.cja.2017.08.004

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