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Homework Help: Labyrinth Seal Leakage Calculation Help Please?

  1. Jul 28, 2012 #1


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    I'm studying mechanical engineering, just have a question on the labyrinth seal leakage equation.

    More specifically, the expansion ratio formula.


    What does the '1n' stand for?
    With 'n + 1n', I'm assuming those two n's are different since one looks like it's in italics and the other looks normal. Can someone please clear this up for me? I understand the rest of the equation, I just can't find what '1n' stands for in my textbook.
  2. jcsd
  3. Jul 28, 2012 #2


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    Staff: Mentor

    Perhaps it's meant to be the natural log function ln(x)? That's the log base e of its argument.
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