×
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

Blade element model

Blade element model

Blade element model

(OP)
Hi,

I am working on helicopter rotor simulation using blade element model and have a question about how to compute the forces and moments at the hub.

I have N blades which are connected to the hub with a vertical and a horizontal hinge. Now, together with the helicopter body I have a pretty complex jointed structure. If I approach to this question from a rigid body simulation point of view I have to write down equations using forces,torques and the constraints of the hinges and solve them. Which is, of course, pretty complex.

So the question is, is there an easy way to compute the thrust and torque on the hub if I know the torques and forces acting on the blades?

Thanks in advance

RE: Blade element model

Everything depends on the accuracy of the model you need.
For a simple one I would reduce it to a first year degree problem. Sum the forces and moments acting on the blade and transport them to the hub.
I think it should be enough as a first aproximation, and if you don“t want to take into account flutter and aerodynamic inestabilities this should be enough.

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