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Type of Document	Dissertation
Author	Thorman, H. Carl
URN	etd-01192006-132244
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-01192006-132244
Title	Boundary layer measurements on an axisymmetric body with spin and yaw
Degree	PhD
Option	Aeronautics
Advisory Committee	Advisor Name Title Anatol Roshko Committee Member Clark Blanchard Millikan Committee Member Homer Joseph Stewart Committee Member
Keywords	none
Date of Defense	1958-01-01
Availability	unrestricted
Abstract A directionally-sensitive hot-wire anemometer was developed for measuring the three-dimensional boundary-layer flow on a spinning, axisymmetric body in a low-speed wind tunnel. Boundary-layer velocity profiles at numerous positions around the body are presented for several spin rates at incidence angles of zero and 3 degrees. Displacement thickness distributions, based on integration of the velocity profiles, are also included. The asymmetries in the azimuthal distribution of the boundary layer around the spinning body at a small angle of incidence (3°) are examined by means of a Fourier analysis of the experimental data. The experimental results are compared with the results of certain theoretical analyses (BRL 870 (Revised), NAVORD 5036) which provide a method for determining Magnus force (and also normal force) due to the displacement effect of the boundary layer.
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