Gas Turbine Flow and Heat Transfer

Leading Edge
A sheet of light from a laser is used to "cut" through the flow and show indiviual sections. The figure on the left above shows the location of the light-sheet and the camera, while the photograph on the right shows the image that is seen through the camera.

At the front part of the blade, the leading edge, a system of horseshoe vortices develops as the flow stagnates at the blade surface. The boundary layer flow near the endwall stagnates with lower pressure, which causes the rollup of the fluid into several time-varying horseshoe vortices. These vortices are silimar to vortices that form at the base of cylinders in cross-flow.

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