منابع مشابه
Measurements of Conditional Velocities in Turbulent Premixed Flames by Simultaneous OH PLIF and PIV
Joint velocity/scalar imaging measurements are performed in turbulent premixed natural-gas/air flames to better characterize the turbulent flux of mean reaction progress variable, ru0c0. Simultaneous two-dimensional measurements of the velocity field and the relative OH concentration are obtained by particle image velocimetry (PIV) and planar laser-induced fluorescence (PLIF) of the OH radical,...
متن کاملFlame front tracking in turbulent lean premixed flames using stereo PIV and time-sequenced planar LIF of OH
This paper describes the simultaneous application of time-sequenced laser-induced fluorescence imaging of OH radicals and stereoscopic particle image velocimetry for measurements of the flame front dynamics in lean and premixed LP turbulent flames. The studied flames could be acoustically driven, to simulate phenomena important in LP combustion technologies. In combination with novel image post...
متن کاملFlowfield-flame structure interactions in an oscillating swirl flame: An investigation using phase resolved and simultaneous OH-PLIF and stereoscopic PIV measurements
A swirling CH4/air diffusion flame at atmospheric pressure was stabilized in a gas turbine model combustor with good optical access. The investigated flame with a thermal power of 10 kW and an overall equivalence ratio of 0.75 exhibited pronounced thermoacoustic oscillations at a frequency of 295 Hz. The main goal of the presented work was a detailed experimental characterization of the flame b...
متن کاملAn Experimental Study of Turbulent Mixing in a Tee Mixer Using PIV and PLIF
Turbulent scalar mixing in the near field of a tee mixer (transverse jet in a pipe) is studied using Particle Image Velocimetry (PIV) and Planar Laser Induced Fluorescence (PLIF). Two jet-to-pipe velocity ratios, r = 3.06 and r = 5.04, are investigated for a turbulent pipe flow at a Reynolds number of 20,850. The laser measurement techniques are described, typical flow structures in the near fi...
متن کاملMeasurements of OH mole fraction and temperature up to 20 kHz by using a diode-laser-based UV absorption sensor.
Diode-laser-based sum-frequency generation of ultraviolet (UV) radiation at 313.5 nm was utilized for high-speed absorption measurements of OH mole fraction and temperature at rates up to 20 kHz. Sensor performance was characterized over a wide range of operating conditions in a 25.4 mm path-length, steady, C2H4-air diffusion flame through comparisons with coherent anti-Stokes Raman spectroscop...
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ژورنال
عنوان ژورنال: Optics Letters
سال: 2018
ISSN: 0146-9592,1539-4794
DOI: 10.1364/ol.43.001115