xluben
10+ year member
CarAudio.com Veteran
has anyone thought of/tried this idea?
looking over some charts for my fluid dynamics class, and it seems that well implemented guide vanes would be much more effective than the often-recommended rounding of port bends (mainly in L-shaped slot ports, but could also apply to labyrinths).
here's what i mean:
as you can see there is a change in loss coefficient by a factor of 5!
i also have some other numbers that show that rounded corner (with a small radius, ie. router-ed corner) would have much less affect (of course doing both would be best).
i'm not sure of the best way to implement this, but maybe some thin-walled pvc cut into 1/3's would work //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
not too much info on a 180 degree turn (as done in car audio boxes) it's just so bad for flow (and in most cases, not practical), so it's not included in my texts, but i'm sure the info's out there somewhere.
and obviously, a flared, straight port is going provide the best airflow possible //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
some more interesting charts:
seems that flared, external port(s) with a large baffle on the outer end would further increase airflow (because air flows into, and out of, a port).
any one with free time and a TL want to test any of these 'theories'? (ie. guide vanes if you have an L-port or a port baffle if you are running flared, external ports)
looking over some charts for my fluid dynamics class, and it seems that well implemented guide vanes would be much more effective than the often-recommended rounding of port bends (mainly in L-shaped slot ports, but could also apply to labyrinths).
here's what i mean:
as you can see there is a change in loss coefficient by a factor of 5!
i also have some other numbers that show that rounded corner (with a small radius, ie. router-ed corner) would have much less affect (of course doing both would be best).
i'm not sure of the best way to implement this, but maybe some thin-walled pvc cut into 1/3's would work //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
not too much info on a 180 degree turn (as done in car audio boxes) it's just so bad for flow (and in most cases, not practical), so it's not included in my texts, but i'm sure the info's out there somewhere.
and obviously, a flared, straight port is going provide the best airflow possible //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
some more interesting charts:
seems that flared, external port(s) with a large baffle on the outer end would further increase airflow (because air flows into, and out of, a port).
any one with free time and a TL want to test any of these 'theories'? (ie. guide vanes if you have an L-port or a port baffle if you are running flared, external ports)