Open AccessNovel method for quantitative and real-time measurements on engine combustion at varying pressure based on the wavelength modulation spectroscopy
Author(s) -
Bo Tao,
Zhiyun Hu,
Wei Fan,
Sheng Wang,
Jingfeng Ye,
Zhenrong Zhang
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.00a762
Subject(s) - combustor , combustion , optics , materials science , modulation (music) , wavelength , spectroscopy , signal (programming language) , measure (data warehouse) , process (computing) , pressure measurement , signal processing , frequency modulation , acoustics , computer science , optoelectronics , mechanical engineering , physics , telecommunications , chemistry , radio frequency , engineering , radar , organic chemistry , quantum mechanics , database , programming language , operating system
The wavelength modulation spectroscopy (WMS) technique has been demonstrated as a powerful and indispensable tool for quantitative and real-time measurements on the combustion process of various industrial devices. However, the varying pressure occurred in the aero-engine combustor significantly affects the accuracy and efficiency of the WMS technique. To address this issue, this work reports a novel method named WMS pressure correction model, which can enable fast signal processing in the measurements at varying pressure. The method was first validated in a heated optical cell, and then applied to the pressure and temperature measurements in an aero-engine combustor. The results show that the new method can efficiently and accurately measure the pressure and temperature at the varying pressure conditions.