Laser ablation plasma-assisted stabilization of premixed methane/air flame

Li, Xiaohui; Yu, Yang; Peng, Jiangbo; Yu, Xin; Fan, Rongwei; Sun, Rui; Chen, Deying

doi:10.1007/s00340-015-6273-z

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…8) Li et al demonstrated ablative plasma ignition using a tantalum surface for burner flame ignition, and showed that the MPE can be significantly reduced. 9,10) Bak et al used a double laser pulse for laser ablation plasma ignition at the burner, and showed combustion enhancement through the use of successive laser pulses. 11) Therefore, it is known that ablation plasma can ignite flammable gas at the MPE through interaction with metal, but only the results of applying the technology have thus far been reported, and no comprehensive research on the mechanism has been conducted, leaving the details of this physical phenomenon poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Laser ablation ignition of flammable gas

Takahashi¹,

Katō²

2021

Jpn. J. Appl. Phys.

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To reduce the minimum pulse energy required for laser ignition (MPE), thereby reducing the cost of the laser device and realizing multipoint ignition with the same laser energy, the ignition mechanism flammable gas using laser ablation was investigated by varying the distance between the target and the focusing lens, together with schlieren and direct color emission observation, which reveals the behavior of the ablative target material and initial flame kernel. It was found that the MPE in the ablative ignition was consistent with the ablation threshold energy of laser fluence on the target, except when the laser focal point was near the target surface. In this latter case, vortex flow induced by laser breakdown and successive collision of the initial flame kernel with the target was observed. The increase in MPE, in this case, was explained by heat loss in the initial flame kernel.

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Section: Introductionmentioning

confidence: 99%

Laser ablation ignition of flammable gas

Takahashi¹,

Katō²

2021

Jpn. J. Appl. Phys.

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“…Li et al [36] found that LA ignition was superior to LIGB ignition in low-speed CH 4 /air mixtures in terms of minimum laser pulse energy. In a follow-up study [37], LA was applied to flame stabilization in CH 4 /air mixture with a velocity up to 15.3 m s −1 .…”

Section: Introductionmentioning

confidence: 99%

A comparative study of laser-induced gas breakdown ignition and laser ablation ignition in a supersonic combustor

An¹,

Yang

Wang³

et al. 2020

J. Phys. D: Appl. Phys.

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Cavity ignition was achieved in a supersonic combustor by laser-induced gas breakdown (LIGB) and laser ablation (LA). High-speed photography and schlieren imaging were employed to characterize the ignition processes. schlieren imaging was also applied to visualize LIGB and LA in quiescent air. The input energy was approximately 200 mJ. The distance between the focal point of the convex lens and the target plate (d) varied from 10 mm above the target plate (d = 10 mm) to 5 mm below the target plate (d = −5 mm). The experiments performed in quiescent air indicated that the plasma of LA (d = −5 mm) was relatively small. Compared to LIGB, the expansion of the hot plume resulting from LA was less significant because the plate prevented the formation of the third lobe. The primary shock wave of LA propagated faster than that of LIGB because of high pressure ratio between the plasma and the ambient air. In the supersonic combustor with d = 5 or 10 mm, the laser induced a plasma by LIGB at the focal point and induced another plasma by LA at the cavity floor. These two tests were the combination of LIGB ignition and LA ignition. LA ignition was achieved in the test with d = −5 mm. The ignition process of the test with d = 10 mm was the slowest because of severe plasma quenching at the focal point. For the early stage of ignition, the flame kernels of the tests with d = 5 and −5 mm were different. However, the differences gradually vanished after the flame kernels reached the cavity leading edge. The ignition times of these two tests were almost the same. Therefore, the plasma resulting from LA was as effective as the plasma generated by LIGB in terms of ignition. Laser ablation ignition was a promising ignition method in a supersonic combustor.

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Stabilization of a premixed methane-air flame with a high repetition nanosecond laser-induced plasma

et al. 2017

Optics & Laser Technology

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Laser ablation plasma-assisted stabilization of premixed methane/air flame

Cited by 5 publications

References 24 publications

Laser ablation ignition of flammable gas

Laser ablation ignition of flammable gas

A comparative study of laser-induced gas breakdown ignition and laser ablation ignition in a supersonic combustor

Stabilization of a premixed methane-air flame with a high repetition nanosecond laser-induced plasma

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