Diode-laser sensor for monitoring multiple combustion parameters in pulse detonation engines

Sanders, Scott T.; Baldwin, J.; Jenkins, Thomas E.; Baer, Douglas S.; Hanson, Ronald K.

doi:10.1016/s0082-0784(00)80258-1

Cited by 134 publications

(41 citation statements)

References 15 publications

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“…Non-intrusive temperature measurements based on diode laser absorption are particularly attractive and have been demonstrated in a variety of flow fields [18][19][20][21] . In previous work in our laboratory, a wavelength-multiplexed tunable diode laser (TDL) sensor was used in a real-time adaptive control system to increase combustion efficiency and reduce emissions in a waste incinerator 22,23 .…”

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confidence: 99%

Sensing and Control of Combustion Instabilities in Swirl-Stabilized Combustors Using Diode-Laser Absorption

Li¹,

Zhou²,

Jeffries³

et al. 2006

42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Thermoacoustic instability and lean blowout (LBO) are monitored in propane/air flames in a swirl-stabilized combustor using a novel tunable diode laser (TDL) sensor for gas temperature using wavelength-scanned laser absorption of two neighboring water vapor transitions near 1.4 μm. Although the gas composition and temperature are not uniform along the sensor line-of-sight, temperature oscillations and fluctuations are clearly identified in the FFT power spectra of the time-resolved data. Detailed experiments are conducted to optimize the position of the sensor line-of-sight in the flame for thermoacoustic instability and LBO sensing. The output of the sensor is used to suppress the thermoacoustic oscillations in a phase-delay feedback control system, and acoustic modulation of the intake air flow suppresses the temperature oscillations by more than 7dB. The low-frequency temperature fluctuations measured by the TDL sensor increase sharply as the flame approaches LBO. The intensity of these low-frequency fluctuations is used to detect the proximity to LBO, and can be used as a control variable for active LBO suppression without knowing the LBO fuel/air ratio limit. The TDL sensor results are compared with traditional pressure and emission sensors, and the TDL sensor is found to offer several advantages including better spatial resolution and insensitivity to background acoustic noise and flame emissions.

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confidence: 99%

Sensing and Control of Combustion Instabilities in Swirl-Stabilized Combustors Using Diode-Laser Absorption

Li¹,

Zhou²,

Jeffries³

et al. 2006

42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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“…A key aspect of implementing this so-called twowavelength TDLAS involves the selection of the optimal transitions, and the transitions used in this work are shown in Table 1. They were selected based on the spectroscopic parameters provided in the HI-TRAN 2008 database [21], with the parameters of some transitions replaced by the measured values reported in [14,22]. These transitions were selected considering the criteria discussed in [23].…”

Section: Measurement Techniquementioning

confidence: 99%

Simultaneous measurements of multiple flow parameters for scramjet characterization using tunable diode-laser sensors

et al. 2011

Appl. Opt.

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This paper reports the simultaneous measurements of multiple flow parameters in a scramjet facility operating at a nominal Mach number of 2.5 using a sensing system based on tunable diode-laser absorption spectroscopy (TDLAS). The TDLAS system measures velocity, temperature, and water vapor partial pressure at three different locations of the scramjet: the inlet, the combustion region near the flame stabilization cavity, and the exit of the combustor. These measurements enable the determination of the variation of the Mach number and the combustion mode in the scramjet engine, which are critical for evaluating the combustion efficiency and optimizing engine performance. The results obtained in this work clearly demonstrated the applicability of TDLAS sensors in harsh and high-speed environments. The TDLAS system, due to its unique virtues, is expected to play an important role in the development of scramjet engines.

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“…The laser sources could perform better with customized designs for specific applications. Nowadays, the tunable laser sources are compact, reliable and relatively cheap, and thus make LAS widely applied to combustion diagnosis in various areas, such as engines monitoring and design (43,(48)(49)(50)(51), gas phase analysis in shock tubes (52)(53)(54)(55) and power plant exhaust monitoring (56)(57)(58).…”

Section: Introductionmentioning

confidence: 99%

Laser absorption spectroscopy for combustion diagnosis in reactive flows: A review

Liu

2018

Applied Spectroscopy Reviews

173

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Laser absorption spectroscopy (LAS) has been rapidly developed and widely applied to combustion diagnosis in recent decades. As a costeffective tool for measuring multiple combustion parameters, LAS provides unique properties in terms of accuracy and sensitivity for understanding the reactions and kinetics in reactive flows. Line-ofsight and tomographic LAS techniques have stimulated numerous applications and been proved to be robust for in situ combustion diagnosis in uniform and non-uniform combustion fields, respectively. This review highlights the breakthroughs in the evolution of LAS techniques from the viewpoints of key principles, sensors and instrumentations developed for combustion diagnosis, with particular emphasis on a series of spatially-resolved LAS techniques with their recent applications on obtaining high-fidelity measurement results with minimal intrusion to the practical combustors. Along the way, we note some challenges and requirements for further development of the LAS-based combustion diagnosis.

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Diode-laser sensor for monitoring multiple combustion parameters in pulse detonation engines

Cited by 134 publications

References 15 publications

Sensing and Control of Combustion Instabilities in Swirl-Stabilized Combustors Using Diode-Laser Absorption

Sensing and Control of Combustion Instabilities in Swirl-Stabilized Combustors Using Diode-Laser Absorption

Simultaneous measurements of multiple flow parameters for scramjet characterization using tunable diode-laser sensors

Laser absorption spectroscopy for combustion diagnosis in reactive flows: A review

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