×
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

Force from a flow impinging on a flat plate

Force from a flow impinging on a flat plate

Force from a flow impinging on a flat plate

(OP)
I need to design a safety device to restrain a flexible hose should a coupling fail. I need to decide on an approximate strength for chain I'm using and so need an estimate of the force from the fluid in the pipe. To calculate this, I would like to model situation as still air at 7 bar in a 5" round pipe impinging on a flat plate at zero distance . I have done some fluid mechanics in the past and feel sure there is a simple equation but cannot find it anywhere (apologies to real fluid engineers who will find this extremely trivial!).

Thanks for your help

RE: Force from a flow impinging on a flat plate

I guess the best way to define what you need to do is give an example based on your numbers given and some assumed values.

I assume that the 7 bar is gauge pressure.  Then the absolute pressure would be 7 barg plus 1 atm or 8.013 bara.  I will further assume a temperature of 16 C.  From this condition I calculate an air density of 9.696 kg/m3.  You state that you have a 5” pipe but a flow is not stated.  Again, I will assume a velocity of 25.4 m/s.  From this data I will multiply the density x the square of the velocity or 9.696 x (25.4 x 25.4) = 6255 n/m2 is the pressure from the air impinging on a flat plate.

I hope that this will be of some help.

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