A  Tunable Diode-laser Absorption Spectroscopy (TDLAS) Thermometry for Combustion Diagnostics

Xin, Yu; Li, F.; Chen, L. H.; Xu, Chang

doi:10.2514/6.2008-2657

Cited by 3 publications

(6 citation statements)

References 7 publications

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“…Since the conditions and the used setup in Ref. [ 36 ] best match ours, we estimated the error for our mole fraction measurements to be ~10%.…”

Section: Figurementioning

confidence: 99%

“…[ 34 ]. The measurement uncertainty for temperature measurements using two-line absorption thermometry with 1.4-µm lasers is discussed in the relevant literature as being between 2.8% [ 7 ] and 6.7% [ 36 ]. In Ref.…”

Section: Figurementioning

confidence: 99%

“…In Ref. [ 36 ], an accuracy of 10% was achieved for the determination of water vapor mole fraction in the exhaust gas of a flat Mckenna-type burner. In Ref.…”

Section: Figurementioning

confidence: 99%

“…Mole fraction measurements using laser absorption methods under best conditions (only CO 2 in N 2 at room temperature) have been reported in the literature with accuracies up to 4%[37]. In Ref [36],. an accuracy of 10% was achieved for the determination of water vapor mole fraction in the exhaust gas of a flat Mckenna-type burner.…”

mentioning

confidence: 99%

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A Compact Fiber-Coupled NIR/MIR Laser Absorption Instrument for the Simultaneous Measurement of Gas-Phase Temperature and CO, CO2, and H2O Concentration

Shi

Endres

Jeffries

et al. 2022

Sensors

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A fiber-coupled, compact, remotely operated laser absorption instrument is developed for CO, CO2, and H2O measurements in reactive flows at the elevated temperatures and pressures expected in gas turbine combustor test rigs with target pressures from 1–25 bar and temperatures of up to 2000 K. The optical engineering for solutions of the significant challenges from the ambient acoustic noise (~120 dB) and ambient test rig temperatures (60 °C) are discussed in detail. The sensor delivers wavelength-multiplexed light in a single optical fiber from a set of solid-state lasers ranging from diodes in the near-infrared (~1300 nm) to quantum cascade lasers in the mid-infrared (~4900 nm). Wavelength-multiplexing systems using a single optical fiber have not previously spanned such a wide range of laser wavelengths. Gas temperature is inferred from the ratio of two water vapor transitions. Here, the design of the sensor, the optical engineering required for simultaneous fiber delivery of a wide range of laser wavelengths on a single optical line-of-sight, the engineering required for sensor survival in the harsh ambient environment, and laboratory testing of sensor performance in the exhaust gas of a flat flame burner are presented.

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“…Since the conditions and the used setup in Ref. [ 36 ] best match ours, we estimated the error for our mole fraction measurements to be ~10%.…”

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

“…In Ref. [ 36 ], an accuracy of 10% was achieved for the determination of water vapor mole fraction in the exhaust gas of a flat Mckenna-type burner. In Ref.…”

Section: Figurementioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

A Compact Fiber-Coupled NIR/MIR Laser Absorption Instrument for the Simultaneous Measurement of Gas-Phase Temperature and CO, CO2, and H2O Concentration

Shi

Endres

Jeffries

et al. 2022

Sensors

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show abstract

“…Diode laser absorption measurement of temperature is commonly based on a two-line technique [8]. The trends of absorption line strength along temperature vary in different temperature range.…”

Section: Introductionmentioning

confidence: 99%

Research on filling process of fuel and oxidant during detonation based on absorption spectrum technology

Wang

2014

SPIE Proceedings

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Research on detonation process is of great significance for the control optimization of pulse detonation engine. Based on absorption spectrum technology, the filling process of fresh fuel and oxidant during detonation is researched. As one of the most important products, H 2 O is selected as the target of detonation diagnosis. Fiber distributed detonation test system is designed to enable the detonation diagnosis under adverse conditions in detonation process. The test system is verified to be reliable. Laser signals at different working frequency (5Hz, 10Hz and 20Hz) are detected. Change of relative laser intensity in one detonation circle is analyzed. The duration of filling process is inferred from the change of laser intensity, which is about 100~110ms. The peak of absorption spectrum is used to present the concentration of H 2 O during the filling process of fresh fuel and oxidant. Absorption spectrum is calculated, and the change of absorption peak is analyzed. Duration of filling process calculated with absorption peak consisted with the result inferred from the change of relative laser intensity. The pulse detonation engine worked normally and obtained the maximum thrust at 10Hz under experiment conditions. The results are verified through H 2 O gas concentration monitoring during detonation.

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Broadening-independent demodulation for wavelength modulation spectroscopy based on even-order harmonics

Chen

Luo

2018

Spectroscopy Letters

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A Tunable Diode-laser Absorption Spectroscopy (TDLAS) Thermometry for Combustion Diagnostics

Cited by 3 publications

References 7 publications

A Compact Fiber-Coupled NIR/MIR Laser Absorption Instrument for the Simultaneous Measurement of Gas-Phase Temperature and CO, CO2, and H2O Concentration

A Compact Fiber-Coupled NIR/MIR Laser Absorption Instrument for the Simultaneous Measurement of Gas-Phase Temperature and CO, CO2, and H2O Concentration

Research on filling process of fuel and oxidant during detonation based on absorption spectrum technology

Broadening-independent demodulation for wavelength modulation spectroscopy based on even-order harmonics

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