WAVELET AND CHAOS ANALYSIS OF IRREGULARITIES OF VORTEX SHEDDING

This paper reports the potential of using two types of wavelets namely ; the Mexican hat and the modulated Gaussian wavelets to analyze the f requency of vortex shedding from a single cylinder in a cross flow. Fu rthermore, the paper examines the chaotic behaviors of the vortex shed ding signals of various positions along the cylinder span. It is found that the signals along the cylinder are characterized by high-energy contents in the low frequency range below the Strouhal frequency. (C) 1998 Elsevier Science Ltd