Page 237 - Aerodynamics for Engineering Students
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220 Aerodynamics for Engineering Students
Q)
B
Fig. 5.11
5.2.3 Variation of velocity in vortex flow
To confm how the velocity outside a vortex core varies with distance from the
centre consider an element in a thin shell of air (Fig. 5.12). Here, flow conditions
depend only on the distance from the centre and are constant all round the vortex at
any given radius. The small element, which subtends the angle 60 at the centre, is
Fig. 5.12 Motion of an element outside a vortex core
