Effects of turbulence stimulators on the boundary layer and resistance of a ship model as detected by hot wires effectsofturbule00bres Year: 1950 Wall of Wood Model (TMB Model 4083) Side Elevation Transverse Section Looking Aft Brass Tubes Inserted in Hull Used as Sockets for Probe. Boundary Layer Thickness Estimated from Flat Plate Theory. Horizontal Section Looking Down from Topside Full Scale Figure 5 - Details of Removable Hot-Wire Probe Used on Tanker Model Thickness of laminar boundary layer computed from Equation [20] on page 52 for a position 5 ft from bow at a speed of knot.
Effects of turbulence stimulators on the boundary layer and resistance of a ship model as detected by hot wires effectsofturbule00bres Year: 1950 Wall of Wood Model (TMB Model 4083) Side Elevation Transverse Section Looking Aft Brass Tubes Inserted in Hull Used as Sockets for Probe. Boundary Layer Thickness Estimated from Flat Plate Theory. Horizontal Section Looking Down from Topside Full Scale Figure 5 - Details of Removable Hot-Wire Probe Used on Tanker Model Thickness of laminar boundary layer computed from Equation [20] on page 52 for a position 5 ft from bow at a speed of knot. The first occurrence of turbulent bursts as shown in Figure 8 is taken as the onset of transition. In some instances it is difficult to distinguish between large laminar oscillations and low-frequency turbulence.* This uncertainty might be resolved by making a pitot-tube survey to determine if the mean ve- locity profile is laminar or turbulent. Although no pitot-tube surveys were conducted on this tanker model, plans are underway to substantiate the hot- wire response to boundary-layer flow on a flat plate by simultaneous measure- ment of the boundary profile with total-head tubes. In any event, it is ♦Records of this type were not common and were obtained at low speeds from wires placed far back on the hull.
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Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
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