Add to BibSonomy
Abstract
Pressure is an important parameter in assessing combustion performance that is typically measured using contact sensors. However, contact sensors usually disturb combustion flows and suffer from the temperature tolerance limit of sensor materials. In this Letter, an innovative noncontact two-color pressure sensing method based on tunable diode laser absorption spectroscopy (TDLAS) is proposed. This makes it possible to measure pressure at high temperature environments for combustion diagnostics. The proposed method uses the linear combination of the collision-broadened linewidths of two H2O absorption lines near 1343 and 1392 nm to measure the pressure. The feasibility and performance of such method have been demonstrated by measuring pressures from 1 to 5 bars at temperatures up to 1300 K with a laser wavelength scanning rate of 20 kHz. Measurement errors were found to be within 3%. Compared to previously reported TDLAS pressure sensors, this method is free from the influence of concentration and can also be combined with the existing two-color TDLAS thermometry to realize a fast, on line, and multi-parameter measurement in combustion diagnostics.
© 2024 Optica Publishing Group
Full Article | PDF ArticleCorrections
16 February 2024: A typographical correction was made to the corresponding author.
More Like This
K. A. Daniel, C. M. Murzyn, D. J. Allen, K. P. Lynch, C. R. Downing, and J. L. Wagner
Opt. Lett. 47(9) 2350-2353 (2022)
Niels Göran Blume and Steven Wagner
Opt. Lett. 40(13) 3141-3144 (2015)
Baijie Xu, Guanfeng Chen, Xizhen Xu, Shen Liu, Changrui Liao, Xiaoyu Weng, Liwei Liu, Junle Qu, Yiping Wang, and Jun He
Opt. Lett. 49(5) 1233-1236 (2024)