Experimental research of vortex generation relief drag
In the report the results of experimental researches of drag coefficient of plates with vortex generation relief (in form of spherical dimples and trench concavities) are represented. Drag of plates was measured by direct method. Experimental data showed that drag coefficient of the dimpled plate may be comparable with drag coefficient of smooth plate. The plates with trench concavities have high drag coefficient (exceeding of drag coefficient of plate with spherical dimples is 15-20%).