Wavelet Transform Analysis of Unsteady Turbulence and Turbulent Burning Velocity in a Constant-Volume Vessel

The determination of the turbulence parameters is a difficult and important problem for combustion analysis. In this study, we propose a newly developed method of defining unsteady turbulence intensity in order to examine the relation between the turbulence characteristics and the burning velocity of turbulent flame propagating in homogeneous fuel-air mixture. We use the discrete wavelet transform, which is a time-frequency analysis method for calculating unsteady turbulence intensity and use a complex-type mother wavelet, the RI-Spline wavelet as the mother wavelet. Our experiments demonstrate the merits of our approach.

[1]  Zhi-Qiang Liu,et al.  EEG analysis using fast wavelet transform , 2000, Smc 2000 conference proceedings. 2000 ieee international conference on systems, man and cybernetics. 'cybernetics evolving to systems, humans, organizations, and their complex interactions' (cat. no.0.

[2]  E. Tomita,et al.  Unsteady Turbulence Analysis By Using Wavelet Transform , 1998 .

[3]  H. Kawabata,et al.  Unsteady signal analysis by using wavelet transform , 1997, 1997 IEEE International Conference on Intelligent Processing Systems (Cat. No.97TH8335).

[4]  Bengt Johansson,et al.  Wavelet analysis of in-cylinder LDV velocity measurements , 1996 .

[5]  Zhong Zhang,et al.  Data Analysis in Unsteady Turbulent Flow Measurement. Preliminary Study of Data Analysis of Turbulent Flow in Engine Cylinder. , 1994 .

[6]  E. Tomita,et al.  Measurement of burning velocity of turbulent flame propagating in fuel-air homogeneous mixtures , 1994 .

[7]  Charles K. Chui,et al.  An Introduction to Wavelets , 1992 .

[8]  E. Tomita,et al.  Direct Measurement of Burning Velocity of Flame Propagating in Fuel-Air Homogeneous Mixtures in a Closed Vessel , 1991 .

[9]  Andrea Catania,et al.  Extraction Techniques and Analysis of Turbulence Quantities From In-Cylinder Velocity Data , 1989 .

[10]  I. Daubechies.  Orthonormal bases of compactly supported wavelets , 1988 .

[11]  E. Tomita,et al.  The Effect of Swirl on the Combustion of a Homogeneous Mixture n a Closed Vessel , 1988 .

[12]  Hiroyoshi Miwa,et al.  MEASUREMENT OF TURBULENCE OF AIR SWIRL IN A 4-STROKE CYCLE ENGINE CYLINDER. , 1987 .

[13]  G. Lavoie.  Correlations of Combustion Data for S. I. Engine Calculations - Laminar Flame Speed, Quench Distance and Global Reaction Rates , 1978 .

[14]  David R. Lancaster,et al.  EFFECTS OF ENGINE VARIABLES ON TURBULENCE IN A SPARK- IGNITION ENGINE , 1976 .