![]() Section, the turbulent boundary layer is equivalent to one that has grown from zero It is to be assumed that, at the upstream end of the working An approximateĪllowance for boundary-layer growth is to be made by allowing the side walls of the working ![]() Long and has a rectangular cross-section which is 1.2m wide by 0.9 m high. Pressure gradient when running empty at an airspeed of 60m s-'. The seventh-root profile with the above thickness quantities indicated is plotted inĮxample 7.4 A wind-tunnel working section is to be designed to work with no streamwise 7.23 Boundary layer growths on flat plate at free stream speed of 60rnls-lĤ20 Aerodynamics for Engineering Students Using the value for I in Eqn (a) above ( I = 0.0973) and substituting appropriately for 6, from Eqn (7.81) and for the integral values, from Eqns (b) and (c), in Eqnsįig. In order to estimate the other thickness quantities for the turbulent layer, the The developments of laminar and turbulent layers for a given stream velocity are Or, in terms of Reynolds number Re, this becomes
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