A glycol-exuding porous leading edge ice protection system was tested in the NASAIcing Research Tunnel at Lewis Research Center. Test results showed that the system was very effective in preventing ice accretion (anti-ice mode) or removing ice from an airfoil. Minimumglycol flow rates required for antiicing are a function of velocity, liquid water content in the air, ambient temperature, and droplet size. Large ice caps were removedin only a few minutes using anti-ice flow rates, with the shed time being a function of the type of ice, size of the ice cap, angle of attack, and glycol flow rate. Wake survey measurementsshowedthat no significant drag penalty was associated with the installation or operation of the system tested.
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