NASA Technical Memorandum 82790

An Experimental Study of Airfoil

Icing Characteristics

Robert J. Shaw, Ray G. Sotos,

and Frank R. Solano

Lewis Research Center

Cleveland, Ohio

Prepared for

Twentieth Aerospace Sciences Conference

sponsored by the American Institute of

Aeronautics and Astronautics

Orlando, Florida, January 11–14, 1982





































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Lewis Research Center

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January 1982

NASA TM–82790

E–1114

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39

An Experimental Study of Airfoil Icing Characteristics

Robert J. Shaw, Ray G. Sotos, and Frank R. Solano

Aircraft icing; Aerodynamics; Airfoil performance

Unclassified -Unlimited

Subject Category: 01

Prepared for the Twentieth Aerospace Sciences Conference sponsored by the American Institute of Aeronautics and

Astronautics, Orlando, Florida, January 11–14, 1982.

A full scale general aviation wing with a NACA 632–A415 airfoil section was tested in the NASA Lewis Icing Research

Tunnel to determine icing characteristics for representative rime and glaze icing conditions. Measurements were made

of ice accretion shapes and resultant wing section drag coefficient levels. A 130 percent increase in drag coefficient for a

20 minute glaze icing encounter for cruise conditions was measured. A 40 percent increase in drag coefficient level was

measured for a 15 minute rime icing encounter for cruise conditions. The NACA 632–A415 wing section was found to

be less sensitive to rime and glaze icing encounters for climb conditions. Comparisons of measured increases in section

drag coefficient with predictions of a NACA correlation indicated agreement was generally as good as that for the

original data upon which the correlation was based. Agreement was less satisfactory for the higher liquid water content

cases compared.