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原文传递 Experimental Study of Supercooled Large Drop Impingement on Ice Shapes.

题名：	Experimental Study of Supercooled Large Drop Impingement on Ice Shapes.
作者：	papadakis, m. rachman, a. wong, s. c. yeong, h. w. hung, k. e.
关键词：	ice shapes,water drop impingement,dye tracer methods,large drop impingement,ice accretion/pressure distributions, aerodynamics, aircraft safety, airfoils, wind tunnels, data reduction methods, tables (data), experimental errors/drop trajectory, impingement parameters, simulated ice shapes, water drop impingement, lawice
摘要：	Water drop impingement data were obtained at the National Aeronautics and Space Administration (NASA) Glenn Icing Research Tunnel for a 36-in chord National Advisory Committee for Aeronautics 23012 airfoil and ten simulated ice shapes using a dye-tracer method. The simulated ice shapes were defined with the NASA Glenn LEWICE 2.2 ice accretion code and included one rime, four mixed, and five glaze ice shapes. The impingement experiments were performed with spray clouds having median volumetric diameters (MVD) of 20, 52, 111, 154, and 236 im. Flow conditions included an angle of attack of 2.5 degrees, total air temperature in the range of 40 degrees - 77 degrees F, and airspeed of 175 mph, corresponding to a Reynolds number of approximately 1.6 million per foot. Test repeatability was established by computing the maximum difference of the peak and total impingement efficiencies of individual test results from the average of all repeated tests at a given condition. The maximum variation of the peak impingement efficiency, maxa , from the average, was less than 10%for 52 of the 56 cases tested, while the maximum variation of the total impingement efficiency from the average was less than 10%for 55 out of the 56 cases. / NOTE: Final rept. / Supplementary Notes: Prepared in cooperation with Boeing Co., Wichita, KS. and National Aeronautics and Space Administration, Cleveland, OH. NASA John H. Glenn Research Center at Lewis Field. Sponsored by Federal Aviation Administration, Washington, DC. Aviation Research and Development. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
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