1987•25th AIAA Aerospace Sciences MeetingRequires access

Comparative low Reynolds number tests of NACA 64-210, NACA 0012, andWortmann FX67-K170 airfoils in heavy rain

R. HANSMAN, Anthony P Craig

Abstract

The effect of simulated rain at 1000 mm/h on the aerodynamic performance of NACA 64-210, NACA 0012, and Wortmann FX67-K170 airfoils is investigated experimentally at Reynolds number 310,000, freestream velocity 70 mph, and angle of attack -10 to +20 deg in the 1 x 1-ft section of the MIT low-turbulence wind tunnel. The results are presented graphically and characterized in detail. Rain is found to produce lift degradation of 5-25 percent, an effect attributed to development of a premature transition at the leading edge followed (after 1-10 s) by alteration of the profile by surface water runback.

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Key concepts: NACA airfoil, Airfoil, Reynolds number, Aerospace engineering, Mechanics, Environmental science, Physics, Materials science