Abinash Sahoo, Venkateswaran Narayanaswamy, Kevin M Lyons
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Particle-free velocity and temperature field imaging using krypton laser-induced fluorescence.
Particle-free simultaneous velocimetry and thermometry of gaseous flow are demonstrated using krypton (Kr) planar laser-induced fluorescence (PLIF). Spectral properties of the Kr 5p[32]2←←4p6S01 absorption profile are leveraged to obtain time-averaged 2D temperature and velocity (in the direction of the laser propagation) fields in a heated M = 0.74 turbulent jet issuing into ambient. Synthetic asymmetric Voigt profiles are fitted to the measured Kr absorption profile, and the resultant collisional widths are mapped to obtain the local temperatures. Doppler shift fields in combination with temperatures are used to obtain the corresponding velocity fields. Whereas the measured mean temperature fields agree to within 7% deviation of the computed temperature field, velocity values show a maximum of 12% deviation.
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The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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