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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

Description: 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.
Date: September 1958
Creator: Braslow, Albert L. & Knox, Eugene C.
Partner: UNT Libraries Government Documents Department
open access

Simplified Method for Determination of Critical Height of Distributed Roughness Particles for Boundary-Layer Transition at Mach Numbers From 0 to 5

Description: Note presenting a simplified method for 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 in a wind tunnel with zero heat transfer. The method has been applied to various types of configurations in several wind-tunnel investigations.
Date: September 1958
Creator: Braslow, Albert L. & Knox, Eugene C.
Partner: UNT Libraries Government Documents Department
open access

The Effect of Magnesium Particles of Various Equivalent Diameters on Some Physical Properties of Petrolatum-Stabilized Magnesium-Hydrocarbon Slurries

Description: Memorandum presenting the effect of magnesium particles of various equivalent diameters on the apparent viscosity, sedimentation ratio, and redispresibility of petroleum-stabilized magnesium-JP-4 slurries. Powders of the following equivalent diameters were investigated: 2.8, 3.8, 7.2, 9.3, 12.0, and 14.8 microns. An analysis of the experimental error and reproducibility of values of apparent viscosity, sedimentation ratio, and redispersibility of the slurries was also made.
Date: April 8, 1954
Creator: Lamberti, Joseph M.
Partner: UNT Libraries Government Documents Department
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