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- W2242527350 abstract "In this paper, a large scale, multi-channel optical Chemical Species Tomography (CST) system is presented to aid research into aero jet-engine performance. Through high-speed, non-intrusive measurement and spatio-temporal imaging of gas concentration dynamics; fuel efficiency, emissions, combustion diagnostics and novel engine designs, can be tested to achieve greener aviation. A 126-channel tunable diode laser absorption spectroscopy (TDLAS) system is proposed, utilizing wavelength modulation spectroscopy (WMS) for robust noise performance in harsh industrial environments. Narrow CO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> absorption spectra, in the region of 1997.2nm, can be obtained from first (1f) and second (2f) harmonics of WMS signals by an FPGA-based digital lock-in amplifier (DLIA). Comparative single-channel gas-cell experiments, using the DLIA and a commercial rack-mounted system, demonstrate the clear prospect of all-digital, scalable, multi-projection CST of jet-engine exhaust-plumes. Further, the low cost and compact nature of FPGAs indicate the feasibility of reduced image reconstruction distortion, through massively multi-channel diagnostic tomography instrumentation." @default.
- W2242527350 created "2016-06-24" @default.
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- W2242527350 date "2015-11-01" @default.
- W2242527350 modified "2023-09-23" @default.
- W2242527350 title "TDLAS using FPGA-based lock-in detection for multi-channel Chemical Species Tomography" @default.
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- W2242527350 doi "https://doi.org/10.1109/icsens.2015.7370677" @default.
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