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Simplified method for determination of critical height of distributed roughness particles for boundary-layer transition at Mach numbers from 0 to 5

Albert L Braslow, E. C. Knox

Abstract

Report presenting a simplified method that has been devised for the determination of the critical height of three-dimensional roughness particles required to promote premature transition of a laminar boundary layer on models of airplanes or airplane components. Results regarding the calculation of critical roughness height, minimization of roughness drag, limitations, and simplifying considerations are provided.

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Available abstract

Key concepts: Mach number, Boundary layer, Airplane, Surface finish, Laminar flow, Drag, Mechanics, Boundary (topology)