. Boundary-layer flow on an axisymmetric body with an inflected stern. Turbulent boundary layer. 5 (PRESENT INVESTIGATION) AFTERBODY 1 (HUANG et a!.' 2) 2(). Figure 1 - Three Afterbodies effectively tripped the flow in. (1 cm) downstream from the wire and, because of the finite parasitic drag of the wire, the boundary-layer can be considered to become turbulent at a virtual origin in. ( cm) up- stream from the trip wire at a Reynolds number of x 10 . The virtual origin for the turbulent flow is defined such that the sum of the laminar fricti
. Boundary-layer flow on an axisymmetric body with an inflected stern. Turbulent boundary layer. 5 (PRESENT INVESTIGATION) AFTERBODY 1 (HUANG et a!.' 2) 2(). Figure 1 - Three Afterbodies effectively tripped the flow in. (1 cm) downstream from the wire and, because of the finite parasitic drag of the wire, the boundary-layer can be considered to become turbulent at a virtual origin in. ( cm) up- stream from the trip wire at a Reynolds number of x 10 . The virtual origin for the turbulent flow is defined such that the sum of the laminar frictional drag from the nose to the trip wire, the parasitic drag of the trip wire, and the turbulent frictional drag aft of the trip wire is equal to the sum of the laminar frictional drag from the nose to the virtual origin and the turbulent frictional drag from the virtual origin to the after end of the model (similar to Reference 10). The virtual origin location was taken as the transition location at which the boundary-layer changed from laminar to turbulent in the boundary-layer calculations. INSTRUMENTATION A Preston tube with a in. ( mm) inside diameter was attached and alined with the flow on the upper meridian of the stern to measure the shear stress distribution. The Preston tube was calibrated in a 1 in. ( cm) diameter water-pipe flow facility described by Huang and von Kerczek. A series of in. ( mm) diameter pressure taps were embedded on the upper meridian of the stern at the Preston tube locations. These pressure taps were connected to a multiple pressure scanivalve system. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Huang, T. T. (Thomas T. ); Groves, Nancy C; Belt, Garnell S; David W. Taylor Naval Ship Research and Development Center. Bethesda, Md. : David W. Taylor Nava
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