Tracer-free laser-induced grating spectroscopy using a pulse burst laser at 100 kHz
Type
ArticleAuthors
Domenico, Francesca D.E.Guiberti, Thibault
Hochgreb, Simone
Roberts, William L.

Magnotti, Gaetano

KAUST Department
Clean Combustion Research CenterMechanical Engineering Program
Physical Science and Engineering (PSE) Division
high-pressure combustion (HPC) Research Group
Date
2019-10-28Permanent link to this record
http://hdl.handle.net/10754/660318
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Show full item recordAbstract
This work shows the first application of a burst laser for laser-induced grating spectroscopy (LIGS) diagnostics. High repetition rate (100 kHz) LIGS is performed in non reacting and reacting flows using the fundamental harmonic of a Nd:YAG pulse-burst laser as pump. In the first part of the paper, we demonstrate the first time-resolved, high repetition rate electrostrictive LIGS measurements in a sinusoidally-modulated helium jet, allowed by the highly energetic pulses delivered by the burst laser (around 130 mJ per pulse). In the second part of the paper, we perform thermal LIGS measurements in a premixed laminar methane/air flame. Thermal gratings are generated in the flame products from the water vapour, which weakly absorbs 1064 nm light. Thus, this work demonstrates the potential of seeding-free high repetition rate LIGS as a technique to detect and time-resolve the instantaneous speed of sound, temperature, and composition in unsteady flow processes.Citation
De Domenico, F., Guiberti, T. F., Hochgreb, S., Roberts, W. L., & Magnotti, G. (2019). Tracer-free laser-induced grating spectroscopy using a pulse burst laser at 100 kHz. Optics Express, 27(22), 31217. doi:10.1364/oe.27.031217Sponsors
King Abdullah University of Science and Technology; Engineering and Physical Sciences Research Council (EP/K02924X); KAUST visting students program; University of Cambridge.Publisher
The Optical SocietyJournal
Optics ExpressAdditional Links
https://www.osapublishing.org/abstract.cfm?URI=oe-27-22-31217ae974a485f413a2113503eed53cd6c53
10.1364/OE.27.031217
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