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자료유형
학술대회자료
저자정보
저널정보
한국연소학회 KOSCO SYMPOSIUM 논문집 제38회 KOSCO SYMPOSIUM 논문집
발행연도
2009.5
수록면
5 - 14 (10page)

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With the developments of computer technologies, three-dimensional direct numerical simulations (DNS) of turbulent combustion have been realized with a detailed or reduced kinetic mechanism. The 3D DNS gives detailed information about turbulent flames, while there are few experimental techniques which have high accuracy enough to compare with DNS. In this paper, after showing summary of recent DNS of turbulent premixed flames, newly-developed laser diagnostics are presented. Simultaneous CH-OH planar laser induced fluorescence (PLIF) and stereoscopic particle image velocimetry (PIV) are used to investigate the local flame structure of the turbulent premixed flames. From CH-OH PLIF and PIV measurements, flame fronts are identified, and the curvature of the flame front and the tangential strain rate at the flame front are evaluated. The experimental results are compared with 3D DNS of hydrogen-air and methane-air turbulent premixed flames. The flame displacement speeds in turbulent premixed flames have been measured directly by the CH double-pulsed PLIF. Since the time interval of the successive CH PLIF can be selected arbitrarily, both of the large scale dynamics and local displacement of the flame front can be obtained. As an application of laser diagnostics for development of high-efficient and low-emission combustors, reconstruction of 3D flame structure is shown by using multiple-plane OH PLIF.

목차

1. Introduction
2. Turbulent Premixed Flames Propagating in Homogeneous Turbulence
3. Ignition and Propagation of Turbulent Premixed Flame
4. Simultaneous CH-OH PLIF and Stereoscopic PIV for Investigation of Local Flame Structure
5. CH Double-Pulsed PLIF for Direct Measurement of Flame Displacement
6. Reconstruction of 3D flame structure by multiple- plane OH PLIF
7. Summary
Acknowledgements
References

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UCI(KEPA) : I410-ECN-0101-2010-431-002013041