Eductor equation and calculations

[aswilson87]

Hello,

I was wondering if any one here knew how to figure out the flowrate for the suction inlet on a eductor.

I know the motive pressure and the suction and motive inlet sizes are also known. If some could let me know what other info I will need and the equations to figure out the suction flowrate I would pull in with a given motive flowrate that would be excellent.

Thank you

 

[kchan711]

Eductors function off the "Venturi-Effect". Look that up within a Fluids book, and it should show all the calculations and equations needed for your solution. You may have to make a mass-balance equation to include the suction port of the eductor and account for the sudden velocity increase of the fluid because of the Venturi-Effect.

Kyle Chandler

http://www.chiefengineering.net

 

[unclesyd]

I think you will find what you need on the following websites.

http://www.s-k.com/index.html

http://www.foxvalve.com/frameset-liquid.html

http://www.johnernst.com/ejectors_indicators_

 

[aswilson87]

My fluids book doesnt cover eductors, only really mentions that there is a pressure drop across a venturi, and how to calculate that...

Okay I will browse the sites listed , the eductor I'm using is a shcute and koerting coincidentally.

If any one has any additional info I would appreciate it.

Thank you

 

[kchan711]

Try this company. I frequently used there air-eductor products, and they tend to have good technical information on hand.

http://www.airvacpumps.com/

Kyle

Kyle Chandler

http://www.chiefengineering.net

 

[hydtools]

aswilson87, did you check the s-k(Schutte and Koerting) site unclesyd refereneced?

Here is their literature for a steam jet syphon with charts showing flows.

http://www.s-k.com/pdf/2A_Steam_Jet_Syphons.PDF

Ted

 

[aswilson87]

I contacted S-K with my specs. I hope they will get back to me.