Downstream evolution of proper orthogonal decomposition eigenfunctions in a lobed mixer

L. Ukeiley, M. Glauser, D. Wick

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

A two-dimensional (one space and time) scalar adaptation of the proper orthogonal decomposition was applied to streamwise velocity data obtained in a lobed mixer flowfield, using a rake of 15 single-component hot wires. Through the application of the proper orthogonal decomposition, the amount of streamwise turbulent kinetic energy contained in the various proper orthogonal modes was examined for two different downstream locations (z/h = 2.6 and 3.9). The large eddy or dominant mode was shown to have a measurable decrease in the relative streamwise component of the kinetic energy between these two downstream locations. This indicates that the large eddy, as defined by the proper orthogonal decomposition, breaks down, and the flow becomes more homogeneous. A pseudoflow visualization technique was then employed to help visualize this process.

Original languageEnglish (US)
Pages (from-to)1392-1397
Number of pages6
JournalAIAA journal
Volume31
Issue number8
DOIs
StatePublished - Aug 1993
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering

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