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Shock wave induced carbon particle formation from CCL4 and C3O2 observed by laser extinction and by laser-induced incandescence (LII) by R. Starke; B. Kock; P. Roth; A. Eremin; E. Gurentsov; V. Shumova; V. Ziborov is a Engineering article available to read on EtoBox.

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The formation of carbonaceous particles from the hydrogen-free precursors CCl 4 and C 3 O 2 , both diluted in argon was studied behind reflected shock waves in the temperature range 1400 K Յ T Յ3700 K and at pressures 1.3 bar Յ p Յ 4.5 bar. The appearance of particles was measured by laser light extinction (LLE) and by laser induced incandescence (LII). Also, some time and spectrally resolved emission measurements were performed. The LLE experiments are sensitive to the optical density of the post-shock gas-particle mixture and show a time-dependent increase, depending on the detailed reaction conditions. The evaluation of the experiments at a reaction time of t ϭ 1 ms results in a double, bell-shaped temperature dependency of the optical density. The LII-experiments, which are sensitive to the particle size, provide particle growth curves determined from several "identical" shock tube experiments with delayed triggering of the LII heat-up laser. Particle sizing experiments at a reaction time of t ϭ 1 ms after shock-induced heat-up of the initial gas mixtures also clearly yield a double, bell-shaped temperature dependency of the particle diameter and confirm the optical density exp

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Author

R. Starke; B. Kock; P. Roth; A. Eremin; E. Gurentsov; V. Shumova; V. Ziborov

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0010-2180)

Published

2003

Language

EN

Field

Engineering (Physical Sciences)