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(Block 20 continued) 



satisfactorily, the measured pressure coefficients in all regions except 

 over the aft 7 percent of body length. In this tail region, the boundary 

 layer is much thicker than the cross section dimensions and the theory 

 overpredicts the measured distributions of the mean velocity. Agreement 

 is particularly poor in the inner region of the tail boundary layer, 

 indicating a need to examine the eddy viscosity model currently used in 

 computing the thick stern boundary layer of three-dimensional models. As 

 was found in the axisymmetric case, the measured values of turbulence 

 intensity, eddy viscosity, and mixing-length parameters in the stern 

 region are much smaller than those of a thin boundary layer. 



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