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The Laminar Boundary Layer on a Rotating Cylinder in Crossflow

The Laminar Boundary Layer on a Rotating Cylinder in Crossflow
Author: E. Krahn
Publisher:
Total Pages: 0
Release: 1955
Genre: Cylinders
ISBN:

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A rotating cylinder in a stream produces a circulation which is regarded as the cause of the Magnus force. The problem is to find the dependence of the circulation on the rotational speed of the cylinder. This question is treated in the present report for a stationary flow about a circular cylinder with the axis perpendicular to the direction of the stream under the assumption that the flow in the boundary layer is laminar. Two approximate methods are used for the calculation of the boundary layer. One is due to Burgers and the other is an adaptation of the Polhusend method. In the case of only one stagnation line on the surface of the cylinder the boundary layer is evaluation numerically, the profiles and the shearing stress computer.


A Solution for Laminar Flow Past Rotating Cylinder in Crossflow

A Solution for Laminar Flow Past Rotating Cylinder in Crossflow
Author: Kevin S. Fansler
Publisher:
Total Pages: 100
Release: 1975
Genre: Boundary layer
ISBN:

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Two-dimensional subcritical flow past a rotating cylinder has been theoretically treated to obtain agreement with the boundary-layer calculations. This study combined a source-wake bound-vortex flow model with a moving-wall boundary-layer calculation to force the final inviscid-flow model to be consistent with boundary-layer theory. Consistency was obtained by an iterative process whereby the separation points of the inviscid-flow model converged toward the separation points found by boundary-layer calculations. The boundary-layer is calculated using the integral-momentum and the integral-energy equations where the family of moving-wall similarity boundary-layer solutions provide relationships between some parameters of the equations.


The Characteristics of a Laminar Boundary Layer on a Spinning Tangent Ogive Cylinder at Angle of Attack

The Characteristics of a Laminar Boundary Layer on a Spinning Tangent Ogive Cylinder at Angle of Attack
Author: H. R. Vaughn
Publisher:
Total Pages: 56
Release: 1972
Genre: Angle of attack (Aerodynamics)
ISBN:

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Streamwise velocity profiles of a laminar boundary layer were determined from pitot pressure measurements made in a supersonic wind tunnel on a spinning tangent ogive cylinder at zero and four degrees angle of attack. A transformation was found which transforms the velocity profiles to be in agreement with the incompressible Blasius profile.