sloshing damper design

[720481]

Anyone can share the book or example to do a sloshing damper design? We designed a steel chimney and we need to add a damper to increase the damping ratio. Any info is appreciated.

 

[GregLocock]

Not quite sure why google doesn't work on your machine but

https://www3.nd.edu/~nathaz/research/liquid/liq_damp.html

gives an overview.

The big question is whether to go for a tuned or untuned system. If you go untuned you might find that sand or ballbearings work better.

With a tuned system you'll need to know the resonant frequencies of the chimney, where the antinodes are for each mode shape (it is most effective to mount the damper at an antidote), and of course the sloshing frequency of your design. Be careful that you don't use too much damping in the damper, this can cause it to be less effective (in practice).

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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[GregLocock]

Sloshing frequency

https://www.hindawi.com/journals/sv/2014/672648/

https://ntrs.nasa.gov/api/citations/19660014177/downloads/19660014177.pdf

I like the first paper as it uses Rayleigh-Ritz.
You could also use a particle based fluid simulation, I have no serious experience with them.

I'm tempted to say that experimentation might be faster will be more accurate.

Given that chimneys get hot is water the ideal fluid? how will you top it up?

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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