The quenching of premixed turbulent flames of iso-octane, methane and hydrogen at high pressures
作者： D Bradley , M Lawes , Kexin Liu , R Woolley , None
DOI: 10.1016/J.PROCI.2006.07.022
关键词: Laminar flow 、 Stretch factor 、 Diffusion flame 、 Turbulence 、 Analytical chemistry 、 Chemistry 、 Premixed flame 、 Laminar flame speed 、 Mechanics 、 Quenching 、 Markstein number
摘要: Abstract Experimental and theoretical studies are reported of turbulent flame quenching, with premixed flames methane–air, iso-octane–air hydrogen–air. Mixtures were exploded in a fan-stirred explosion bomb which the rms velocity was varied by changes fan speed. Influences Markstein number, pressure up to 1.5 MPa, Karlovitz stretch factor, K , studied. It found that ratio positive rate for extinction laminar strain an important parameter. Probabilities propagation, p f from initial kernel measured. The conditions probabilities 0.8 0.2 correlated terms factor number. However, at given probability, P bf spectrum rates would support declined increase . This probability assumed quenching equal steady-state flame. Its declining value constant attributed, least part, inability non-steady-state flamelets respond transient excursions values excess those extinguish flames. Another possibility highly convoluted able follow route through regions sufficiently low avoid extinctions.
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