Simultaneous CO concentration and temperature measurements using tunable diode laser absorption spectroscopy near 2.3 μm

Sane, Anup; Satija, Aman; Lucht, Robert P.; Gore, Jay P.

doi:10.1007/s00340-014-5792-3

Cited by 25 publications

(14 citation statements)

References 32 publications

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“…The temperature will be determined from the ratio of peak intensities using two or more ro-vibrational transitions. [17, 18, 34] The steady pressure measurement to determine mole fraction will set the uncertainty floor for the measurement of time-varying pressure. Steady pressure measurements can typically be made to 0.01 % or better.…”

Section: 1 Methodsmentioning

confidence: 99%

“…The approach we propose builds on the vast body of work in the gas sensing and combustion diagnostics fields pioneered by the Hanson research group. [15–18] The recent review by Hanson describes the current state-of-the-art for the laser diagnostic techniques for combustion and chemical kinetics research. [15] For example Hiller et al demonstrated measurement of the gas velocity and pressure fields using Laser-Induced-Florescence measurements.…”

Section: 1 Introductionmentioning

confidence: 99%

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Towards a standard for the dynamic measurement of pressure based on laser absorption spectroscopy

Douglass

Olson

2016

Metrologia

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We describe an approach for creating a standard for the dynamic measurement of pressure based on the measurement of fundamental quantum properties of molecular systems. From the linewidth and intensities of ro-vibrational transitions we plan on making an accurate determination of pressure and temperature. The goal is to achieve an absolute uncertainty for time-varying pressure of 5 % with a measurement rate of 100 kHz, which will in the future serve as a method for the traceable calibration of pressure sensors used in transient processes. To illustrate this concept we have used wavelength modulation spectroscopy (WMS), due to inherent advantages over direct absorption spectroscopy, to perform rapid measurements of carbon dioxide in order to determine the pressure. The system records the full lineshape profile of a single ro-vibrational transition of CO2 at a repetition rate of 4 kHz and with a systematic measurement uncertainty of 12 % for the linewidth measurement. A series of pressures were measured at a rate of 400 Hz (10 averages) and from these measurements the linewidth was determined with a relative uncertainty of about 0.5 % on average. The pressures measured using WMS have an average difference of 0.6 % from the absolute pressure measured with a capacitance diaphragm sensor.

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Section: 1 Methodsmentioning

confidence: 99%

Section: 1 Introductionmentioning

confidence: 99%

Towards a standard for the dynamic measurement of pressure based on laser absorption spectroscopy

Douglass

Olson

2016

Metrologia

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“…where C is the target gas concentration, P [atm] is the local total pressure, φ [cm] is the normalized line shape function, and T [K] is the local temperature. For atmosphere pressure and a high temperature, the line shape is usually approximated by a Voigt profile [59,60]. The line strength of molecular transition…”

Section: The Principles Of Tdlasmentioning

confidence: 99%

Measurement of Temperature Distribution Based on Optical Fiber-Sensing Technology and Tunable Diode Laser Absorption Spectroscopy

Sun¹,

Sun²,

Tang³

et al. 2018

Temperature Sensing

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Temperature is an important physical quantity in most industrial processes. Distributed temperature sensor (DTS), fiber Bragg grating (FBG), and tunable diode laser absorption spectroscopy (TDLAS) are three primary techniques for temperature measurement using fiber optic sensing and spectrum technology. The DTS system can monitor space temperature field along the fiber in real time. In addition, it also can locate a fire source using two sections of optical fibers which are placed orthogonally to each other. The FBG temperature sensor is used to measure the point temperature. The temperature sensitivity of the bare FBG is 10.68 pm/ C and the linearity is 0.99954 in the range of 30-100 C. Based on tunable diode laser absorption spectroscopy (TDLAS), two-dimensional (2D) distribution reconstructions of gas temperature are realized using an algebraic reconstruction technique (ART). The results are in agreement with the simulation results, and the time resolution is less than 1 s.

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“…For atmosphere pressure and a high temperature, the line shape is usually approximated by a Voigt profile [20,21]. The line strength of molecular transition S [T(x)] [cm −2 atm −1 ] is a function of temperature as follows [22]: …”

Section: Absorption Spectroscopy Fundamentalsmentioning

confidence: 99%

A Study of Two Dimensional Tomography Reconstruction of Temperature and Gas Concentration in a Combustion Field Using TDLAS

Sun

Zhang

et al. 2017

Applied Sciences

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Based on tunable diode laser absorption spectroscopy (TDLAS), two-dimensional (2D) distribution reconstructions of gas concentration and temperature are realized using an algebraic reconstruction technique (ART). The influence of the beam distribution and grid size on combustion field reconstruction is investigated to attain optimal reconstruction results with a limited number of beams. Under limited optical-path numbers, it shows that a better spatial resolution is attainable only when the laser beam paths are vertical and parallel to the symmetry axis of the combustion field. Furthermore, experiments with 16 beam paths using one and two flat flame combustion fields are carried out in different fuel-air equivalence ratios under room temperature. The results are in agreement with the simulation results, and the time resolution is less than 1 s.

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Simultaneous CO concentration and temperature measurements using tunable diode laser absorption spectroscopy near 2.3 μm

Cited by 25 publications

References 32 publications

Towards a standard for the dynamic measurement of pressure based on laser absorption spectroscopy

Towards a standard for the dynamic measurement of pressure based on laser absorption spectroscopy

Measurement of Temperature Distribution Based on Optical Fiber-Sensing Technology and Tunable Diode Laser Absorption Spectroscopy

A Study of Two Dimensional Tomography Reconstruction of Temperature and Gas Concentration in a Combustion Field Using TDLAS

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