A method to characterise jets using correlations of large-scale features in instantaneous planar images

Birzer, C.; Kalt, P.; Nathan, G.; Australasian Fluid Mechanics Conference

A method to characterise jets using correlations of large-scale features in instantaneous planar images

2010

Birzer, C. | Kalt, P. | Nathan, G. | Australasian Fluid Mechanics Conference (17th : 2010 : Auckland, New Zealand)

An approach to characterise jets by analysis of the locations of large-scale features identified in images of the instantaneous flow field is presented. A frequency domain is generated from the correlations of identified large-scale features in ensembles of instantaneous planar images. The frequency-domain correlation image provides a measure of the underlying large-scale features; namely the characteristic distances and angles between large-scale features, number densities of large-scale features in the image field, variations in distance between large-scale features and their dominant mode. The approach is assessed analytically and applied to experimental data. Results show that the proposed method can be used successfully to characterise the large-scale features of jet flows.

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C. H. Birzer, P. A. M. Kalt and G. J. Nathan

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http://www.17afmc.com/17afmc/index.cfm?p=programme2

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