Terahertz time-domain spectroscopy of high-pressure flames

doi:10.1007/s11708-009-0033-x

Frontiers of Energy and Power Engineering in China

2009, Vol. 3

Issue (2): 123-133 https://doi.org/10.1007/s11708-009-0033-x

RESEARCH ARTICLE

本期目录

Terahertz time-domain spectroscopy of high-pressure flames

Jason BASSI¹, Mark STRINGER², Bob MILES², Yang ZHANG¹(

)

1. School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, United Kingdom; 2. School of Electronic and Electrical Engineering, The University of Leeds LS2 9JT, Leeds, United Kingdom

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Abstract：

Laser spectroscopy in the visible and near infrared is widely used as a diagnostic tool for combustion devices, but this approach is difficult at high pressures within a sooty flame itself. High soot concentrations render flames opaque to visible light, but they remain transparent to far-infrared or terahertz (THz) radiation. The first far-infrared absorption spectra, to the best of our knowledge, of sooty, non-premixed, ethylene high-pressure flames covering the region of 0.2-2.5 THz is presented. A specially designed high-pressure burner which is optically accessible to THz radiation has been built allowing flame transmission measurements up to pressures of 1.6 MPa. Calculations of the theoretical combustion species absorption spectra in the 0.2-3 THz range have shown that almost all the observable features arise from H₂O. A few OH (1.84 and 2.51 THz), CH (2.58 THz), and NH₃ (1.77 and 2.95 THz) absorption lines are also observable in principle. A large number of H₂O absorption lines are observed in the ground vibrational in a laminar non-premixed, sooty flame (ethylene) at pressures up to 1.6 MPa.

Key words： terahertz time-domain spectroscopy high-pressure flames H₂O absorption lines

收稿日期: 2008-10-08 出版日期: 2009-06-05

Corresponding Author(s): ZHANG Yang,Email:yang.zhang@manchester.ac.uk

引用本文:

. Terahertz time-domain spectroscopy of high-pressure flames[J]. Frontiers of Energy and Power Engineering in China, 2009, 3(2): 123-133.
Jason BASSI, Mark STRINGER, Bob MILES, Yang ZHANG. Terahertz time-domain spectroscopy of high-pressure flames. Front Energ Power Eng Chin, 2009, 3(2): 123-133.

链接本文:

https://academic.hep.com.cn/fie/CN/10.1007/s11708-009-0033-x
https://academic.hep.com.cn/fie/CN/Y2009/V3/I2/123

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