PRELIMINARY INVESTIGATION OF CYCLIC DE-ICING OF AN AIRFOIL USING AN EXTERNAL ELECTRIC HEATER

摘要

An investigation was conducted in the NACA Lewis icing research tunnel to determine the characteristics and requirements of cyclic de-icing of a 65,2-216 airfoil by use of an external electric heater. The present investigation was limited to airspeed of 175 miles per hour. Data are presented to show the effects of variations in heat-on and heat-off periods, ambient air temperature, liquid-water content, angle, of attack, and heating distribution on the requirements for- cyclic de-icing. , The external heat flow at various icing and heating conditions is also presented.