Turbulent boundary layer on a body of revolution under conditions of distributed air blowing

Computational and experimental analysis of the effect of stationary distributed air blowing through a perforated surface on the properties of a turbulent boundary layer formed on an elongated axisymmetric body of revolution under conditions of an incompressible flow around at the Reynolds number ReL=4.39·106 is carried out. The blowing coefficient Cb was varied in the range 0 – 0.01397. The Reynolds number Re**, defined by the boundary-layer momentum thickness δ** in front of the perforated section, was 5603. It is shown that with an increase in the streamwise coordinate x to a distance of 600δ** from the perforated section, a stable decrease in local skin friction is observed, the maximum value of which reaches 100% directly in the control region at maximal blowing intensity. Under these conditions, the total aerodynamic drag of the body of revolution can be reduced by at least 8.7%.