Measurement of unsteady flow reattachment on an airfoil with an ice shape

Phillip J. Ansell, Michael B. Bragg

Research output: Contribution to journalComment/debatepeer-review


An innovative method for determining the unsteady shear-layer reattachment location downstream of a flow obstacle using a surface-mounted hot-film array is proposed. The method uses strong levels of anticorrelation between adjacent probes across short time windows to determine the unsteady location of shear-layer reattachment. The resulting time histories for the unsteady reattachment location on the airfoil compared well with the mean reattachment location and the estimated reattachment zone determined from surface oil-flow visualization. Similar trends were observed in the probability density function of the unsteady reattachment location between the current investigation and PIV-derived reattachment data. Implementation of this method to the separation bubble downstream of a simple geometry, like a backward-facing step, would assist in further development of this method.

Original languageEnglish (US)
Pages (from-to)656-659
Number of pages4
JournalAIAA journal
Issue number3
StatePublished - Mar 2014

ASJC Scopus subject areas

  • Aerospace Engineering


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