Add to BibSonomy
Abstract
Optical diagnostics of gas-phase pressure are relatively unusual. In this work, we demonstrate a novel, rapid, and robust method to use laser-induced grating scattering (LIGS) to derive this property in real time. Previous pressure measurements with LIGS have employed a signal fitting method, but this is relatively time-consuming and requires specialist understanding. In this paper, we directly measure a decay lifetime from a LIGS signal and then employ a calibration surface constructed using a physics-based model to convert this value to pressure. This method was applied to an optically accessible single-cylinder internal combustion engine, yielding an accuracy of better than 10% at all tested conditions above atmospheric pressure. This new approach complements the existing strength of LIGS in precisely and accurately deriving temperature with a simple analysis method, by adding pressure information with a similarly simple method.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Yulan Wu, Pengji Ding, Yue Zheng, Tongxun Zhao, Zoumingyang Zhu, Xiaoliang Liu, Shaohua Sun, Jijin Wang, Zuoye Liu, and Bitao Hu
Opt. Express 30(10) 17038-17053 (2022)
Bernhard Hiller and Ronald K. Hanson
Appl. Opt. 27(1) 33-48 (1988)
Mark A. Woodmansee, Robert P. Lucht, and J. Craig Dutton
Appl. Opt. 39(33) 6243-6256 (2000)