Projects per year
We present a photoacoustic technique for in situ sensing of particulates in reacting flows. The method is demonstrated by measuring soot distribution in laminar flat-flames. The excitation source is a high repetition-rate pulsed fibre laser. The resulting acoustic signals are measured using a uni-directional microphone and lock-in amplifier. Based on an Allan-Werle plot, the detection limit is estimated to be a soot volume fraction of 3 parts-per-billion. Fluence curves are presented, showing a plateau region similar to the behaviour typically observed for laser-induced incandescence. A dependence of the photoacoustic signal on pulse repetition rate is also demonstrated.
|Number of pages||6|
|Journal||Applied Physics B: Lasers and Optics|
|Early online date||14 Mar 2019|
|Publication status||Published - 30 Apr 2019|
|Event||8th International Workshop on Laser-Induced Incandescence - Evangelische Akademie, Tutzing, Germany|
Duration: 10 Jun 2018 → 13 Jun 2018
- soot measurement
- fibre laser
- laminar flames
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- 1 Finished
In-situ Chemical Measurement and Imaging Diagnostics for Energy Process Engineering (Platform Grant)
1/10/16 → 30/09/21