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Detail into the turbine hood inlet.

When I took this photo, I was surprised that I was unable to see the convolutions of the bellows. Later on the same trip I scanned a diagram which shows that there's a liner covering the bellows.

In retrospect this makes perfect sense, both to avoid disturbing the flow of gasses and to avoid collecting soot.

Unfortunately, as I was unaware of the liner at the time, I didn't take a corresponding photo of the discharge end of the hood, which may have showed the end of the liner.