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Shop air:

80psi 60cfm

- Thread starter bigbsonnier
- Start date

- #1

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Shop air:

80psi 60cfm

- #2

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I am pretty flighty with my passions. So I got it in my head to use my natural math (just above zero to many of you I'm sure) ability, the generic teaching system and this here internet to grow my understanding to at least where I can understand what is being said in those beautiful numbers. I might be a bit of a pain on here for a bit.

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"I would guess double the pipe you half the pressure. "

But don't quote me on that...

But don't quote me on that...

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Really? Same volume going through smaller pipe. I can't get my head around this quite yet.when you decrease the pipe size and volumetric flow rate remains constant - velocity increases and pressure drops,

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[itex]

\[ P + \frac{1}{2}\rho v^2 + \rho g h = constant\]

[/itex]

In your case the only variables changing from one tube to the other are the flow velocity and the pressure, both of which you can work out from your pressure and tube diameter data if you also know the volumetric flow rate..

- #8

Q_Goest

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Pressure drop through pipe or tube is generally done per the Darcey Weisbach equation which is given by equation 1 in the attachment called "Pipe-Flo Pro.PDF" https://www.physicsforums.com/showthread.php?t=179830".what would be a general equation to model the pressure loss or increase to the motor.

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I'm trying to get the dp with the sudden change of diameter. Length is not my conern right now.

I have read throught the entire document yet so the answer may yet be in there but thank you any way because i know i'll use it in the future.

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