Numerical Simulation of Organised and Self-Organised Separated Flows in the Framework of Multiblock Computational Technologies

摘要

The vortex intensification mechanism of heat transfer on the dimpled surfaces and crossed flow control of the bodies with additional construction elements like forward disks and vortex cells is analyzed by numerical methods. Self-organizing 3D vortex structures generating within dimple enhance the heat transfer from the wall and the effect on the boundary layer by bleeding-suction or rotating central body of the vortex cell results in diminishing of the separation effect influence accompanied by the reduction of the body drag and increasing of lift force. 3D vortex like toroid generated in the gap between forward disk and leading body edge is responsible for the pressure deficit at this region and as a sequence additional thrust that almost compensates the forward disk drag Vortex strain at the forward separation region at the angle of attack different from zero causes the effect of head stability for the cylinder with forward disc.