3 kHz PIV/OH-PLIF measurements in a gas turbine combustor at elevated pressure

Boxx, Isaac; Slabaugh, Carson D.; Kutne, Peter; Lucht, Robert P.; Meier, Wolfgang

doi:10.1016/j.proci.2014.06.090

Cited by 65 publications

(21 citation statements)

References 17 publications

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“…Particle image velocimetry (PIV) is the de facto standard 2D velocity measurement technique in GTC-relevant flows (e.g. Fureby et al (2007) ;Stopper et al (2013); Temme et al (2014); Arndt et al (2015); Boxx et al (2015); Cosic et al (2015); Caux-Brisebois et al (2014)). However, multi-kHz PIV measurements from diode-pumped solidstate lasers typically generate relatively low signal compared to conventional pulsed lasers, while highpressure liquid-fueled combustion generates high background luminosity from flame chemiluminescence and soot.…”

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confidence: 99%

Development and evaluation of gappy-POD as a data reconstruction technique for noisy PIV measurements in gas turbine combustors

2016

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How to cite TSpace itemsAlways cite the published version, so the author(s) will receive recognition through services that track citation counts, e.g. Scopus. If you need to cite the page number of the author manuscript from TSpace because you cannot access the published version, then cite the TSpace version in addition to the published version using the permanent URI (handle) found on the record page.This article was made openly accessible by U of T Faculty. Please tell us how this access benefits you. Your story matters. Experiments in Fluids manuscript No. (will be inserted by the editor)Development and evaluation of Gappy-POD as a data reconstruction technique for noisy PIV measurements in gas turbine combustorsReceived: date / Accepted: date Abstract Low signal-to-noise in particle image velocimetry (PIV) measurements in systems such as high pressure gas turbine combustors can result in significant data gaps that negatively affect subsequent analysis. Here, gappy proper orthogonal decomposition (GPOD) is evaluated as a method of filling such missing data. Four GPOD methods are studied, including a new method that utilizes a median filter (MF) to adaptively select whether a local missing data point is updated with a new guess at each iteration. These methods also are compared against local Kriging interpolation. The GPOD methods are tested using PIV data without missing vectors that were obtained in atmospheric pressure swirl flames. Parameters studied include the turbulence intensity, amount of missing data, and he amount of noise in the valid data. Two criteria to check for GPOD convergence also were investigated.The MF method filled in the missing data with the lowest error across all parameters tested, with approximately one-third the computational cost of Kriging. Furthermore, the accuracy of MF GPOD was relatively insensitive to the quality of the convergence criterion. Therefore, compared to the three other GPOD methods and Kriging interpolation, the MF GPOD method is an effective method for filling missing data in PIV measurements in the current gas turbine combustor flows.

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confidence: 99%

Development and evaluation of gappy-POD as a data reconstruction technique for noisy PIV measurements in gas turbine combustors

2016

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“…The additional cost is comparable with or less than that of other advanced diagnostic techniques requiring multiple high speed cameras such as stereoscopic particle imaging velocimetry and three-dimensional flame tomography. [39,40] …”

Section: Resultsmentioning

confidence: 99%

High dynamic range thermometry at 5 kHz in hydrogen–air diffusion flame using chirped‐probe‐pulse femtosecond coherent anti‐stokes Raman scattering

Dennis

Satija

Lucht

2015

J Raman Spectroscopy

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Chirped probe pulse femtosecond coherent anti-Stokes Raman scattering (CPP fs-CARS) thermometry was performed at 5 kHz in a hydrogen jet diffusion flame with an air co-flow. Measurements were performed at different heights and radial locations within the jet diffusion flame, up to 16 nozzle exit diameters downstream (x/d = 16). The near-nozzle measurements were characterized by large, organized, buoyancy-driven instabilities that become more chaotic at the downstream locations x/d ≥ 4. The diffusion flame results highlight temperature fluctuations characteristic of the buoyancy-driven Kelvin-Helmholtz-type instability and provide new insights into the transient structure of these flames. At some measurement locations, the time-varying temperatures ranged from 300 K to nearly 2400 K. The CPP fs-CARS signal intensity is a factor of approximately 1000 times lower at 2400 K compared with 300 K. A dual-channel detection system was used to increase the dynamic range of the CARS measurements. The determination of temperature from the single shot spectra is discussed in detail. Laser and detection system parameters were determined from CPP fs-CARS spectra obtained from a near-adiabatic laminar calibration flame apparatus. The temperature precision of the system was determined from these calibration measurements and was found to be better than 2.0% at 2200 K. The influence of an instrument response function on spectral fitting parameters is systematically assessed. Published 2015.

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“…With the advantages of nonintrusive, on-beam, good temporal and spatial resolution and visualization, the laser diagnostic technique [1][2][3][4] continues to be a primary tool for the understanding of fluid dynamics and combustion physics. The laser-based velocity measurement technique is one of the important branches.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional interferometric Rayleigh scattering velocimetry using multibeam probe laser

Sheng

et al. 2017

Opt. Eng

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Abstract. In order to achieve the two-dimensional (2-D) velocity measurement of a flow field at extreme condition, a 2-D interferometric Rayleigh scattering (IRS) velocimetry using a multibeam probe laser was developed. The method using a multibeam probe laser can record the reference interference signal and the flow interference signal simultaneously. What is more, this method can solve the problem of signal overlap using the laser sheet detection method. The 2-D IRS measurement system was set up with a multibeam probe laser, aspherical lens collection optics, and a solid Fabry-Perot etalon. A multibeam probe laser with 0.5-mm intervals was formed by collimating a laser sheet passing through a cylindrical microlens arrays. The aspherical lens was used to enhance the intensity of the Rayleigh scattering signal. The 2-D velocity field results of a Mach 1.5 air flow were obtained. The velocity in the flow center is about 450 m∕s. The reconstructed results fit well with the characteristic of flow, which indicate the validity of this technique.

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3 kHz PIV/OH-PLIF measurements in a gas turbine combustor at elevated pressure

Cited by 65 publications

References 17 publications

Development and evaluation of gappy-POD as a data reconstruction technique for noisy PIV measurements in gas turbine combustors

Development and evaluation of gappy-POD as a data reconstruction technique for noisy PIV measurements in gas turbine combustors

High dynamic range thermometry at 5 kHz in hydrogen–air diffusion flame using chirped‐probe‐pulse femtosecond coherent anti‐stokes Raman scattering

Two-dimensional interferometric Rayleigh scattering velocimetry using multibeam probe laser

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