Ignition and Flameholding Characteristics of Laser Igniters in Supersonic Airstreams
作者:
Hideyuki Horisawa,
Shuhei Tsuchiya,
Junya Negishi,
Yoko Okawa,
Itsuro Kimura,
期刊:
AIP Conference Proceedings
(AIP Available online 1904)
卷期:
Volume 702,
issue 1
页码: 445-455
ISSN:0094-243X
年代: 1904
DOI:10.1063/1.1721022
出版商: AIP
数据来源: AIP
摘要:
An investigation on effects of a focused laser pulse for combustion enhancement characteristics was conducted for supersonic airstreams with a transverse hydrogen‐fuel injection. Numerical simulations using a time‐dependant Navier‐Stokes equation with finite‐rate chemistry were conducted to elucidate laser‐induced ignition and mixing enhancement characteristics. From the results, it was confirmed that, depending on the laser energy density and focal points, radicals, a shock wave, and shock‐induced local turbulences were being formed through the laser irradiation. Then recirculation zones with flamelets were induced. Moreover it was shown that these flamelets grew in moving upstream and downstream from the focal point up to 1 msec. From these results, it was shown that laser‐induced plasmas could be effective in both combustion reaction and mixing enhancements for the supersonic combustion. © 2004 American Institute of Physics
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