AXIAL FANS, HONEY COMB, in a wind tunnel

how much does an axial fan of about 50-80" rotor diameter cost in india i searched for the companies in india through google but it yielded no results i want a cheap axial-fan for a wind-tunnel also is honey comb found in nepal or india what would be another choice for a honeycomb in a wind tunnel am from nepal please reply

Dear santosh sharma:

Crossed "venetian blinds". ######################

###################### Could always buy the honeycomb mailorder:

###################### Could stack short lengths of pipe or tube, and solder / sinter them together.

Just some ideas...

David A. Smith

If you are talking well sub sonic - the poor mans fan drive is an auto engine driving a propeller. And metal strips with transverse slots could make a handy-dandy flow-straightening honey-comb, don't you think?

:-)

Good luck

Brian Whatcott Altus OK

I've stacked layers of "egg crate" light diffusers with mesh screens between layers in a free surface water tunnel.

The classic cheap method is a stack of plastic soda straws held between two taut mesh screens in frames or pieces of perforated plate. The key point is you want the channels to have fully developed flow.

You need mesh screens as well a honeycomb to damp all three components of turbulence. The honeycomb reduces the two transverse components and the screens /perforated plate reduces the axial component.

thanks to all of u for ur response well i would take the help of the group farther if needed that's it!