. Effects of turbulence stimulators on the boundary layer and resistance of a ship model as detected by hot wires . v. ,/S !/>, E = x 10s Transitional Flow U = knots './^ '/"" ,S„/\ '"',' M U*,v E = x ios Transitional Flow U = knots Wr v* .'.'. "V ^/••^("fV^/*'.^''!^/' ^.f^J^t *vv E = X 10° Turbulent Flow U = 3-25 knots Figure 7 - Characteristic Oscillograms of the Development of the Turbulent Boundary Layer at Hot Wire 17 Without Artificial Turbulence Stimulation The low speeds are of particular interest in that the development of the tran- s

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. Effects of turbulence stimulators on the boundary layer and resistance of a ship model as detected by hot wires . v. ,/S !/>, E = x 10s Transitional Flow U = knots './^ '/"" ,S„/\ '"',' M U*,v E = x ios Transitional Flow U = knots Wr v* .'.'. "V ^/••^("fV^/*'.^''!^/' ^.f^J^t *vv E = X 10° Turbulent Flow U = 3-25 knots Figure 7 - Characteristic Oscillograms of the Development of the Turbulent Boundary Layer at Hot Wire 17 Without Artificial Turbulence Stimulation The low speeds are of particular interest in that the development of the tran- sition zone and the regression of the laminar area can be followed. After the boundary-layer surveys the probes were removed from the model and resistance tests were made to obtain a record of the changes pro- duced on the drag of the model by the use of the various stimulators. In all these tests care was taken to duplicate the conditions which were imposed for the boundary-layer surveys. It must be noted, however, that in order to in- stall and to remove the trip wire and sand strip all of the ballast (3900 lb)

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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity