×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Shock Waves on Supercritical Airfoils

Shock Waves on Supercritical Airfoils

Shock Waves on Supercritical Airfoils

(OP)
I've got a question coming up on a test concerning shock waves and super critical airfoils. I've been t a bunch of website but i still don't understand completly. so anyways,

1. How/why are shock waves created on a supercritical airfoil flying above the critical mach number but below supersonic speed.


2. where along the airfoil does the shock wave form, does it have anything to do with the point of lowest pressure or the point of maximum thickness of the airfoil?

thanks a lot

RE: Shock Waves on Supercritical Airfoils

1) the local mach number is supersonic ... this was a problem with WW2 fighter wings.

2) i think it is related to the pressure distribution, but whether it is lowest, highest, or steepest gradient (which would imply highest velocity) i'm not sure.

i am surprised that you couldn't get this off the web (wiki?)

RE: Shock Waves on Supercritical Airfoils

Review you Prandtl-Meyer and Bernouli equations expressed in Mach numbers.  Wikipedia has a pretty decent explanation actually.

http://en.wikipedia.org/wiki/Mach_number

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources