Investigation of Effects of Distributed Surface Roughness on a Turbulent Boundary Layer Over a Body of Revolution at a Mach Number of 2.01 PDF Download
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Author: John R. Sevier Publisher: ISBN: Category : Body of revolution Languages : en Pages : 31
Book Description
An investigation has been made of the effects of distributed surface roughness, consisting of lathe-tool marks, on the skin friction of a turbulent boundary layer over a body of revolution at a Mach number of 2.01. The investigation was made on three ogive-cylinders at zero angle of attack over a surface-roughness range from 23 to 480 microinches root mean square and for a Reynolds number range based on body length from 4,000,000 to 30,000,000.
Author: John R. Sevier Publisher: ISBN: Category : Body of revolution Languages : en Pages : 31
Book Description
An investigation has been made of the effects of distributed surface roughness, consisting of lathe-tool marks, on the skin friction of a turbulent boundary layer over a body of revolution at a Mach number of 2.01. The investigation was made on three ogive-cylinders at zero angle of attack over a surface-roughness range from 23 to 480 microinches root mean square and for a Reynolds number range based on body length from 4,000,000 to 30,000,000.
Author: K. R. Czarnecki Publisher: ISBN: Category : Aerodynamics, Supersonic Languages : en Pages : 35
Book Description
An investigation has been made of the effects of distributed surface roughness, consisting of lathe-tool marks, on the skin-friction drag of a body of revolution at a Mach number of 1.61. The tests were made on ogive-cylinders at zero angle of attack over a roughness range from 23 to 480 microinches root mean square and over a Reynolds number range from 2,500,000 to 37,000,000.
Author: Felix W. Fenter Publisher: ISBN: Category : Languages : en Pages : 63
Book Description
A theory is described which can be used to predict accurately the skin friction drag of surfaces with uniform grain-type roughness. The roughness does not necessarily have to extend to the leading edge of the surface for an accurate calculation to be made. Uniform surface roughness composed of spherical beads does not affect the boundary layer in a manner significantly different from grain-type roughness, provided that the grains and the spheres are bonded to the surface in a similar manner. Consequently, the theory accurately predicts the effects of spherical roughness elements on skin friction under these conditions. The effect of a given type of roughness on turbulent boundary layer characteristics is strongly dependent upon the density of distribution of the roughness elements. The effect of maximum density V-grooves on turbulent boundary layer characteristics is dependent upon the sweepback angle. The effect of increasing sweepback is to reduce the skin friction drag. (Author).
Author: John R. Sevier
Author: John R. Sevier
Author: 
Author: K. R. Czarnecki
Author: Albert L. Braslow
Author: Richard D. Samuels
Author: 
Author: K. R. Czarnecki
Author: Edwin J. Saltzman
Author: Daniel W. Lester
Author: Felix W. Fenter