×
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

Friction in Exhaust Stack

Friction in Exhaust Stack

Friction in Exhaust Stack

(OP)
Exhaust stack have friction chart like the one I attached.

How about for higher temperature? If there is not chart available, what equation should be used?

Christopher Kenneth Choa

RE: Friction in Exhaust Stack

(OP)
Would compressible gas equation govern? Even with very huge diameter?
Im not sure...

Christopher Kenneth Choa

RE: Friction in Exhaust Stack

There could be a couple of methods:

Most of drop is the loss of velocity head at the exit. Calculable from various compressible gas formulas

You can always make your own table for this method and see how it compares against your published table.

Good luck.

RE: Friction in Exhaust Stack

I don't believe the compressible gas formulas will apply to something you call an "exhaust stack." What process is the exhaust coming from - a boiler maybe?

RE: Friction in Exhaust Stack

(OP)
Its from a compressor system. So from a burner.

Christopher Kenneth Choa

RE: Friction in Exhaust Stack

I think the formula will apply, but you will be in the laminar area and you need to be carefull when calculating your friction factor. As noted rememebr the exit loss.

RE: Friction in Exhaust Stack

The chart you posted will give you the friction loss at Standard Conditions, typically at 70 degrees F and sea level.

Click on the link I posted below.

Scroll all the way down to near the end of the linked article, to "Air Density Correction." There you will see how to CORRECT the friction you calculated at Standard Conditions, to the friction you will have at the higher temperature and altitude.

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