Measurement of CO2 concentration and temperature in an aero engine exhaust plume using wavelength modulation spectroscopy

Research output: Contribution to journalArticle

Abstract

In this paper, the 2f/1f tunable diode laser wavelength modulation technique is used for the simultaneous measurement of concentration and temperature of CO2 in the exhaust plume of an aero engine. The suitability of the R48 spectral feature of CO2 at 1997.2 nm is discussed for this application and for further investigations into the application of CO2 tomographic imaging on large-scale aero-engines. To ensure accurate recovery of gas parameters at the high exhaust temperatures a full spectral characterisation of the spectral feature is presented using direct spectroscopy. The 2f/1f method is validated in the laboratory for controlled gas mixtures and temperatures to recover concentration and temperature, showing good agreement with the actual temperature and concentration values. Finally, single path measurements are presented for an aero engine exhaust showing good correlation with the measured engine conditions.
LanguageEnglish
Pages6409-6417
Number of pages9
JournalIEEE Sensors Journal
Volume17
Issue number19
Early online date11 Aug 2017
DOIs
Publication statusPublished - 1 Oct 2017

Fingerprint

Exhaust systems (engine)
plumes
engines
Modulation
Spectroscopy
modulation
Wavelength
wavelengths
spectroscopy
Engines
Temperature
temperature
gas temperature
gas mixtures
Gas mixtures
semiconductor lasers
recovery
Semiconductor lasers
Imaging techniques
Recovery

Keywords

  • laser spectroscopy
  • optical sensors
  • combustion diagnostics
  • aero engine exhaust plumes
  • TDLS
  • wavelength modulation spectroscopy
  • optical tomography
  • aerospace engineering

Cite this

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title = "Measurement of CO2 concentration and temperature in an aero engine exhaust plume using wavelength modulation spectroscopy",
abstract = "In this paper, the 2f/1f tunable diode laser wavelength modulation technique is used for the simultaneous measurement of concentration and temperature of CO2 in the exhaust plume of an aero engine. The suitability of the R48 spectral feature of CO2 at 1997.2 nm is discussed for this application and for further investigations into the application of CO2 tomographic imaging on large-scale aero-engines. To ensure accurate recovery of gas parameters at the high exhaust temperatures a full spectral characterisation of the spectral feature is presented using direct spectroscopy. The 2f/1f method is validated in the laboratory for controlled gas mixtures and temperatures to recover concentration and temperature, showing good agreement with the actual temperature and concentration values. Finally, single path measurements are presented for an aero engine exhaust showing good correlation with the measured engine conditions.",
keywords = "laser spectroscopy, optical sensors, combustion diagnostics, aero engine exhaust plumes, TDLS, wavelength modulation spectroscopy, optical tomography, aerospace engineering",
author = "Thomas Benoy and David Wilson and Michael Lengden and Ian Armstrong and George Stewart and Walter Johnstone",
note = "(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.",
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month = "10",
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T1 - Measurement of CO2 concentration and temperature in an aero engine exhaust plume using wavelength modulation spectroscopy

AU - Benoy, Thomas

AU - Wilson, David

AU - Lengden, Michael

AU - Armstrong, Ian

AU - Stewart, George

AU - Johnstone, Walter

N1 - (c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

PY - 2017/10/1

Y1 - 2017/10/1

N2 - In this paper, the 2f/1f tunable diode laser wavelength modulation technique is used for the simultaneous measurement of concentration and temperature of CO2 in the exhaust plume of an aero engine. The suitability of the R48 spectral feature of CO2 at 1997.2 nm is discussed for this application and for further investigations into the application of CO2 tomographic imaging on large-scale aero-engines. To ensure accurate recovery of gas parameters at the high exhaust temperatures a full spectral characterisation of the spectral feature is presented using direct spectroscopy. The 2f/1f method is validated in the laboratory for controlled gas mixtures and temperatures to recover concentration and temperature, showing good agreement with the actual temperature and concentration values. Finally, single path measurements are presented for an aero engine exhaust showing good correlation with the measured engine conditions.

AB - In this paper, the 2f/1f tunable diode laser wavelength modulation technique is used for the simultaneous measurement of concentration and temperature of CO2 in the exhaust plume of an aero engine. The suitability of the R48 spectral feature of CO2 at 1997.2 nm is discussed for this application and for further investigations into the application of CO2 tomographic imaging on large-scale aero-engines. To ensure accurate recovery of gas parameters at the high exhaust temperatures a full spectral characterisation of the spectral feature is presented using direct spectroscopy. The 2f/1f method is validated in the laboratory for controlled gas mixtures and temperatures to recover concentration and temperature, showing good agreement with the actual temperature and concentration values. Finally, single path measurements are presented for an aero engine exhaust showing good correlation with the measured engine conditions.

KW - laser spectroscopy

KW - optical sensors

KW - combustion diagnostics

KW - aero engine exhaust plumes

KW - TDLS

KW - wavelength modulation spectroscopy

KW - optical tomography

KW - aerospace engineering

U2 - 10.1109/JSEN.2017.2738333

DO - 10.1109/JSEN.2017.2738333

M3 - Article

VL - 17

SP - 6409

EP - 6417

JO - IEEE Sensors Journal

T2 - IEEE Sensors Journal

JF - IEEE Sensors Journal

SN - 1530-437X

IS - 19

ER -