Flow Conditioning In Tube
Flow Conditioning In Tube
(OP)
We are trying to measure the air velocity and pressure in aircraft air conditioning hoses. We have been using "laminar flow tubes", basically just long straight tubes about 15 times the diameter of the hose. Now we are flowing more air, which means we have increased our hose sizes. The laminar flow tubes are now too long to fit in our space. What simple techniques can we use to "straighten" the air in our laminar flow tubes so that the tubes do not need to be so long?





RE: Flow Conditioning In Tube
Reidh
RE: Flow Conditioning In Tube
maybe your pump (compressor, whatever) isn't big enough to provide the required demand and overcome the losses ?
RE: Flow Conditioning In Tube
2. The laminar flow tube is used to measure the static and total pressures of the airflow in a ventilation hose. The flow tube is installed for test purposes only.We connect a vaccum fan to the laminar flow tube and draw air through a large cabinet. We are interested in measuring the pressure drop across the cabinet.
RE: Flow Conditioning In Tube
Good luck
RE: Flow Conditioning In Tube
Reidh
RE: Flow Conditioning In Tube
If the flow through the tube isn't enough to blow the straws out of the boxes and it's not for a permanent test stand that idea might be worth a look, at least from a cost point of view!
RE: Flow Conditioning In Tube
Crease the paper into strips, using appropriate fold directions.
flatten them back out. Apply glue to one strip in three. Stick another piece of the paper to it. Repeat.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Flow Conditioning In Tube
i did exactly that years ago, making a small wind tunnel in the basement ..... flow was VERY straight and VERY slow.
also.... tie them down ..... do you know what 2000 straws look like scattered across the room? (i do !)
regards
magicme
------------------------------------
"not all that glitters is gold"
RE: Flow Conditioning In Tube
RE: Flow Conditioning In Tube