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مکانیک::
گردابه نعل اسبی
are passage vortex, trailing edge vortices, corner vortex, and horseshoe vortex.
The objective is to create a strong suction side branch of the horseshoe vortex, causing it to interact with a vortex from the main passage of the opposite rotational direction, and move it away from the suction side profile boundary layer.
In the designing of the con- tour in the end wall region, the intent is to reinforce the horseshoe vortex as it develops close to the stagnation point of the profile.
A stronger suction side bulb intensifies the desired horseshoe vortex locally.
For highly loaded lowpressure turbine blades operating at low velocities (Mach 0.2), the advantage of introducing a leading edge bulb in the end wall area is in the form of an inten- sified horseshoe vortex on the suction side of the airfoil.
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