Need help building a wind tunnel
I'm starting a project for my AH Physics. Planning to build a wind tunnel, but wondering what kind of fan should I use to power the wind tunnel? Going to test some aerofoil in it so I'll probably need 5~15m/s going thru the tunnel.
Thinking of fitting may be 8 high speed delta 12cm fans but I'm wondering if they can push enough air through the tunnel to get that kind of wind speed? The tunnel size will be about 31*x cm (where x = 10~31). Those high speed fans cost a lot though :( So I'm looking for alternative solutions or fans to do the job. Could be an industrial fan or computer case fans. Either running on 12V or mains is fine. But I need a speed control to adjust the wind speed. Thanks everyone :P