An empirically derived basis for calculating the area, rate, and distribution of water-drop impingement on airfoils

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Summary: An empirically derived basis for predicting the area, rate, and distribution of water-drop impingement on airfoils of arbitrary section is presented. The concepts involved represent an initial step toward the development of a calculation technique which is generally applicable to the design of thermal ice-prevention equipment for airplane wing and tail surfaces. It is shown that sufficiently accurate estimates, for the purpose of heated-wing design, can be obtained by a few numerical computations once the velocity distribution over the airfoil has been determined. The calculation technique presented is based on results of extensive water-drop trajectory computations for five airfoil cases which consisted of 15-percent-thick airfoils encompassing a moderate lift-coefficient range. The differential equations pertaining to the paths of the drops were solved by a differential analyzer.
Collection: NASA Technical Reports Server (NTRS) Collection.
Note: Document ID: 19930092143.
Accession ID: 93R21433.
NACA-TR-1107.
Terms of Use and Reproduction: No Copyright.

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