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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

AN EXPERIMENTAL STUDY ON UNSTEADY HEAT TRANSFER PROCESS OVER ICE ACCRETING AIRFOIL SURFACES PERTINET TO AIRCRAFT ICING PHEOMENA

Yang Liu
Department of Aerospace Engineering, Iowa State University, Ames, Iowa, 50010, USA

Rye Waldman
Department of Aerospace Engineering, Iowa State University, Ames, Iowa, 50010, USA

Hui Hu
Department of Aerospace Engineering, Iowa State University, Ames, Iowa 50011, USA

Abstract

By leveraging the unique Icing Research Tunnel available at Iowa State University (ISU-IRT), an experimental study was conducted to quantify the transient surface water runback and unsteady heat transfer process over the surfaces of ice accreting airfoil/wing models in order to elucidate the underlying physics pertinent to aircraft icing phenomena. A suite of advanced flow diagnostic techniques, which include molecular tagging velocimetry and thermometry (MTV&T), digital image projection (DIP), and high-speed infrared (IR) imaging thermometry techniques, were developed and applied to achieve quantitative measurements to quantify the transient behavior of wind-driven surface water film/rivulet flows, unsteady heat transfer and dynamic ice accreting process over the surfaces of airfoil/wing models at different icing conditions. The findings derived from the icing physics studies can be used to improve current icing accretion models for more accurate prediction of ice formation and accretion over aircraft wing surfaces and to develop effective anti-/de-icing strategies for safer and more efficient operation of aircraft in cold weather.

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