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Post by turbochris on Dec 13, 2014 13:52:36 GMT -5
This is the impeller for the peroxide pump for the bloodhound land speed car. why would they shape it like this with the weird inducer and the curves that blend to the radial section? not used to seeing things that don't pump compressible fluid.  |
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Post by enginewhisperer on Dec 14, 2014 16:08:17 GMT -5
I guess with the fluid being much more dense than air, it has a lot more inertia, so you can have a complete screw section for the inducer before sending it through the centrifugal pump section.
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gidge348
Senior Member
Joined: September 2010
Posts: 426 
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Post by gidge348 on Dec 14, 2014 19:37:50 GMT -5
Just found this interesting site, hydra-tech.com/9-different-impeller-types/It says the centrifugal screw impeller is for pumping "oil and viscous liquids" then the radial section is more like the "high head impeller" to add the pressure or maybe H2O2 acts differently at different states like a non Newtonian fluid? |
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GrantB
Junior Member
Joined: February 2012
Posts: 61
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Post by GrantB on Jun 20, 2016 8:24:48 GMT -5
Sorry for bumping such an old thread. www.barber-nichols.com/sites/default/files/wysiwyg/images/rocket_engine_turbopumps.pdfAnother thing to remember is these impellers are transferring thousands of horsepower through something the size of a 25hp outboard prop. Cavitation is a huge issue and these impellers run at the bleeding edge of cavitation. I also believe they run into issues with surface speed which limits their diameters. |
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