Measurement of unsteady flow reattachment on an airfoil with a leading-edge horn-ice shape

Phillip J. Ansell, Michael B. Bragg

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A technique for identifying the unsteady shear-layer reattachment location downstream of an ice shape on an airfoil using an array of surface-mounted hot-film probes is presented. The method utilizes statistical comparison of signals from adjacent probes to identify regions of strong anti-correlation, indicating flow bifurcation at reattachment. In an example, hotfilm array measurements were obtained for two airfoil models with simulated leading-edge ice shapes. These hot-film array measurements were used to generate time histories for the unsteady location of shear-layer reattachment downstream of a leading-edge ice shape. The resulting spectral content of the unsteady shear-layer reattachment locations reveal influences of regular-mode vortex shedding and shear-layer flapping. The Strouhal numbers corresponding to these two flow phenomena compared well to those found in literature. Statistical reduction of the unsteady location of reattachment is also consistent with prior work.

Original languageEnglish (US)
Title of host publication30th AIAA Applied Aerodynamics Conference 2012
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages611-624
Number of pages14
ISBN (Print)9781624101854
DOIs
StatePublished - 2012
Event30th AIAA Applied Aerodynamics Conference 2012 - New Orleans, LA, United States
Duration: Jun 25 2012Jun 28 2012

Publication series

Name30th AIAA Applied Aerodynamics Conference 2012

Conference

Conference30th AIAA Applied Aerodynamics Conference 2012
Country/TerritoryUnited States
CityNew Orleans, LA
Period6/25/126/28/12

ASJC Scopus subject areas

  • Aerospace Engineering

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