3.41), but taking into account the virtual beginning of the boundary layer at each flow rate. The numbers Re are not calculated from the geometrical data of the length of the working section ( Section 3.7, Fig. The last point on curve (4) (between lines (E) and (F)) corresponds to Re=1.33♱0 6. 6.8, the first measurements of the friction resistance were carried out at U ∞=0.1 m/s direct (A) (Re=2.59♱0 5), second measurements U ∞=0.2 m/s direct (B) (Re=5.17♱0 5), third measurements U ∞=0.3 m/s straight line (C) (Re=7.75♱0 5), fourth measurements U ∞=0.4 m/s straight line (D) (Re=1.033♱0 6), fifth measurements U ∞=0.5 m/s straight line (E) (Re=1.293♱0 6), sixth measurements U ∞=0.6 m/s straight line (F) (Re=1.55♱0 6). Then, using a valve, the speed flow increased and, at a constant value of the speed, sequential measurements of the friction resistance of the insert were carried out. After reaching a constant speed, measurements of the friction resistance of the insert were carried out. Then the pump was turned on and the speed flow in the area of the insert was determined. Before the experiments and after they were carried out, the strain gauge was calibrated when the pump was not running. The method of carrying out these measurements was as follows. The purpose of these investigations is to check the basic concepts of the receptivity problem and to determine the effect of gaps around the insert on the results of investigations of elastic plates: as shown in Section 6.2, the gaps can significantly affect the C f value. 5.7, Section 5.1), and (A)–(E) are indicated in the text. The dependence of the friction drag coefficient on the number Re on the insert of the working section of the hydrodynamic stand of small turbulence: (1)–(3) are the calculated dependences for the laminar, transition, and turbulent boundary layers, respectively Experimental data: (4) rigid insert (standard) with a turbulizer and a 1.5 mm front slit, (5) a standard without a turbulizer and with a 1.5 mm front slit, (6) the same as (5), but a 0.5 mm front slit, (7) polyurethane foam with an outer film (plate 4a according to Table 5.4, Section 5.1), (8) is the same as (7), but when the plate is heated ( Fig.
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