Optical detection of the response of a diffusion flame to excitation

Davis, M. R.; Jumppanen, Paavo

doi:10.1016/0010-2180(93)90138-s

Cited by 10 publications

(1 citation statement)

References 21 publications

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“…These oscillations appear when the interactions of the sound and the thermo-acoustic source are phased to promote growth of the oscillation. Extensive researches have been carried out (Candel, 1992;Clanet et al, 1999;Clavin, 1985;Davis and Jumppanen, 1993;Davis and Li, 1995;Jones, 1945;Lawn, 1982;McManus et al, 1993;Parker, 1988). Thermoacoustic instability remained a challenging problem facing the modern combustor designer.…”

Section: Introductionmentioning

confidence: 99%

Flame patterns of acoustic wave and flame interaction in a cylindrical tube

Papadopoulos

Pitchard

Green

et al. 2001

J Vis

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In this short paper, flame and acoustic wave interactions under laboratory conditions have been reported. The test rig consists of a cylindrical Perspex tube and a fuel tube (burner) positioned along the central axis of the tube. The acoustic characteristics of the rig are measured. The flame instability with and without acoustic excitation has been investigated. A high shutter speed colour camera has been applied to capture many interesting unstable flame patterns. It has been found that strong flame instability only occurs at particular frequencies. The position ofthe burner inside the cylindrical tube also has an effect on flame instability.

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Section: Introductionmentioning

confidence: 99%

Flame patterns of acoustic wave and flame interaction in a cylindrical tube

Papadopoulos

Pitchard

Green

et al. 2001

J Vis

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Combustion Enhancement by Active Control

et al.

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Evaluation of fractal dimension for mixing and combustion by the schlieren method

Davis

1996

Experiments in Fluids

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The evaluation of fractal dimension values from schlieren flow images has been investigated. It was found for passive mixing heated jet flows that a value of 2.31, close to that obtained by tomographic imaging, was obtained. For turbulent diffusion flames a value of 2.40 was obtained, and this increased slightly with axial movement and with acoustic excitation of the flame. Broadly counteracting effects due to the transverse differentiation and integration along the imaging beam inherent in the schlieren method was found to arise.

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Optical detection of the response of a diffusion flame to excitation

Cited by 10 publications

References 21 publications

Flame patterns of acoustic wave and flame interaction in a cylindrical tube

Flame patterns of acoustic wave and flame interaction in a cylindrical tube

Combustion Enhancement by Active Control

Evaluation of fractal dimension for mixing and combustion by the schlieren method

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