I've got a question for you. I've got to design an inlet spike, in a fully ducted installation. The outside size and shape I've got figured out. Once it heads into the nacelle I've got 2 thoughts, as you can see below. My instinct says that it should be shaped like image A below... the pointy one. However, a couple years ago, I spoke with someone that builds our model turbines, and he was adamante that inside ducts should end rounded prior to turbine intakes, as shown in image B.
He was referencing how my F-15 ducts came together and ended in a sharp seam, when in fact if it were fatter, and could be rounded where they joint, it would be much better. Seemed backwards to me.


Thoughts? A or B?

Thanks,
Lance