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Why do bowls have vanes?

3272 Views 29 Replies 16 Participants Last post by  1/4 Miler, 
Rivernut
Don't they reduce flow?
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W
straighten

Help straighten the water out to flow better on exit.
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F
Wicked Performance Boats said:
Help straighten the water out to flow better on exit.
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sooo...which is better...more or less??

FastRat
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FastRat said:
sooo...which is better...more or less??

FastRat
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Depends on application. What works for you. and what you already have.:(:(
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1/4 Miler
Rivernut said:
Don't they reduce flow?
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To compensate for the veins thickness/reduction in volume,the bowl is increased in volume a proportional amount. The veins, stators, are in the bowl for two basic reasons ... one to 'straighten' (actually to counter the flow coming off the impeller) and, two, more importantly, to direct the water to the outer inner surface of the bowl so as to accelerate the velocity of the water so as to its increase pressure as it moves into the smaller portion of the rear of the bowl into the more confining droop/snoot and nozzle which increases the pressure even more.
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K
Boom
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MikeF
1/4 Miler said:
To compensate for the veins thickness/reduction in volume,the bowl is increased in volume a proportional amount. The veins, stators, are in the bowl for two basic reasons ... one to 'straighten' (actually to counter the flow coming off the impeller) and, two, more importantly, to direct the water to the outer inner surface of the bowl so as to accelerate the velocity of the water so as to its increase pressure as it moves into the smaller portion of the rear of the bowl into the more confining droop/snoot and nozzle which increases the pressure even more.
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I thought the increase in velocity.....lowers the pressure.....jus sayin.
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Delemorte
Rivernut said:
Don't they reduce flow?
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Yes but how to you propose having a internal and external shell on a bowl with out the veins. You have to hold the outside and inside rigid some how. Other wise the back end of that pump shaft is gonna bounce all over the place... I would think...
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1/4 Miler
MikeF said:
I thought the increase in velocity.....lowers the pressure.....jus sayin.
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Increased velocity into a decreasing smaller volume creates higher pressure, yes? ..... 'packing effect' .......

Yes, the veins in the bowl designs currently available provide support for the rear bearing and are necessary in that aspect, but, as I posted above they have other functions inherent to their design ....... who knows what someone might come up with in the future.
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460
Give it time. The resident information nutt will be here to explain in full detail:D
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1/4 Miler
Doc Nozzle said:
We interrupt our regularly scheduled thread for this important announcement:
View attachment 49460
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Correct you are ..... anything else constructive other than a mistake in english that you'd like to add? Not being a native speaker, I do sometimes make some mistakes in english.
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Doc Nozzle said:
We interrupt our regularly scheduled thread for this important announcement:
View attachment 49460
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Damn :)violenthil:)


Where is the Jetaholic with the real deal:)grn:)computer
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propless
1hotboat said:
Where is the Jetaholic with the real deal:)grn:)computer
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I'm sure as soon as he gets off the phone (asking everyone he knows for the answer) he will post a tech article for you. :|err
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bp298
the veins create volute sections within the bowl. volutes are designed to convert velocity energy into pressure energy. pump design 101...
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propless said:
I'm sure as soon as he gets off the phone (asking everyone he knows for the answer) he will post a tech article for you. :|err
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hil:)hil:)hil:)
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P
bp 298 has got the answer . Short and sweet !! Jim :)devil
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Sleeper CP
Performance Jet said:
bp 298 has got the answer . Short and sweet !! Jim :)devil
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Not much gets past him, but I didn't know it was vanes :)bulb

S CP :D
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Master Sergeant
http://en.wikipedia.org/wiki/Bernoulli's_principle
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Doc Nozzle
I realize that one of the things I hate about the PB Forum is the excessive drama. My earlier post about spelling was out of line. I thought it would be funny but it was over the top. I apologize.

Doc
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Sleeper CP
I thought it was funny :)

S CP :D
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