DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf
ISBN Print: 978-1-56700-229-4
ISSN: 2377-2816
Wavelet Analysis of IR-images of a Turbulent Steam Flow
Краткое описание
This paper presents an IR-imaging technique to visualize a turbulent steam flow. Instantaneous, time-averaged, Gaussian-smoothed and non-linear filtered IR-images are compared. Wavelet thresholding is applied to separate the coherent part of the instantaneous intensity field from the incoherent part. The averaged image has been smoothed with a non-linear filter that preserves the energy content of the thermal image better than the Gaussian low-pass filtering. High frequency wavelet components of the processed IR-images highlight the differences of the applied filtering techniques. Reconstruction the flow pattern from these components shows the directional orientation of the instantaneous and averaged flows.