Typical surface roughness heights for aircraft surfaces

  • #1
JaWolf
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Hello!
I am investigating some preliminary aerodynamics on a regional turboprop and for the drag model the surface roughness height of the airplane is required as an input. For this i do not have any data. In which range are the typical values for modern aircraft surfaces?
Thanks a lot!
 

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  • #2
berkeman
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  • #3
boneh3ad
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Hello!
I am investigating some preliminary aerodynamics on a regional turboprop and for the drag model the surface roughness height of the airplane is required as an input. For this i do not have any data. In which range are the typical values for modern aircraft surfaces?
Thanks a lot!

Typical surface roughness: "As built"

I am curious what kind of model takes this into account, as its primary effect is on boundary-layer transition, but the relationship between the two is extremely complicated. Also, as a typical airplane flies around, it accumulates dirt and grime from weather and bug strikes, so the as-flown surface roughness changes over time and is going to be different from the as-built surface roughness.
 
  • #4
Ranger Mike
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in Search bar type in surface texture
posted by Ranger Mike
i have written much on this subject
merry Christmas
 

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