Editing Pump (section)

====Regenerative turbine pump <span class="anchor" id="Peripheral pump"></span>====
[[File:Regenerative Turbine Pump Animatic.gif |thumb|right |alt=Regenerative turbine pump animation |Regenerative turbine pump animation]]
[[File:Close-up of a Regenerative Turbine Pump Impeller inside of a T51 Series pump from MTH Pumps.jpg|thumb|Close-up of a Regenerative Turbine Pump Impeller]]
Also known as '''drag''', '''friction''', '''[[liquid-ring pump]]''', '''peripheral''', '''traction''', '''turbulence''', or '''vortex''' pumps, regenerative turbine pumps are a class of [[rotodynamic pump]] that operates at high head pressures, typically {{convert|4|-|20|bar|kPa psi}}.<ref name="DORPUNET">{{cite journal
| vauthors = Quail F, Scanlon T, Stickland M
| title = Design optimisation of a regenerative pump using numerical and experimental techniques
| journal = International Journal of Numerical Methods for Heat & Fluid Flow
| date = 2011-01-11
| volume = 21
| pages = 95–111
| doi = 10.1108/09615531111095094
| url = https://strathprints.strath.ac.uk/8091/6/strathprints008091.pdf
| access-date = 2021-07-21
}}</ref>

The pump has an impeller with a number of vanes or paddles which spins in a cavity. The suction port and pressure ports are located at the perimeter of the cavity and are isolated by a barrier called a '''stripper''', which allows only the '''tip channel''' (fluid between the blades) to recirculate, and forces any fluid in the '''side channel''' (fluid in the cavity outside of the blades) through the pressure port. In a regenerative turbine pump, as fluid spirals repeatedly from a vane into the side channel and back to the next vane, kinetic energy is imparted to the periphery,<ref name="DORPUNET"/> thus pressure builds with each spiral, in a manner similar to a regenerative blower.<ref name= Roth>{{cite web |url= https://www.rothpump.com/regenerative-turbine-pump-little-pump-big-head.html |title= Regenerative Turbine Pump |work= rothpump.com |accessdate= 30 April 2021 }}</ref><ref>{{cite journal |url= https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=CFD+Analysis+of+Domestic+Centrifugal+Pump+for+Performance+Enhancement&btnG= |title= CFD Analysis of Domestic Centrifugal Pump for Performance Enhancement |last1= Rajmane |first1= M. Satish |last2 = Kallurkar |first2= S.P. |journal= International Research Journal of Engineering and Technology |volume= 02 / #02 |date= May 2015 |accessdate = 30 April 2021}}</ref><ref name= Ebsray>{{cite web |url= https://www.psgdover.com/docs/default-source/ebsray-docs/brochures/brochure-ebsray-rc-series-regenerative-turbine-pumps---rc20-rc25-rc40.pdf |title= Regenerative turbine pumps: product brochure |work= PSG Dover: Ebsra |pages=((3{{hyphen}}4{{hyphen}}7)) |accessdate= 30 April 2021}}</ref>

As regenerative turbine pumps cannot become [[vapor lock]]ed, they are commonly applied to volatile, hot, or cryogenic fluid transport. However, as tolerances are typically tight, they are vulnerable to solids or particles causing jamming or rapid wear. Efficiency is typically low, and pressure and power consumption typically decrease with flow. Additionally, pumping direction can be reversed by reversing direction of spin.<ref name= Ebsray/><ref name= Roth/><ref name= Dynaflow>{{cite web |url= http://dynafloweng.com/regenturbinepumps.html |title= Regenerative Turbine Pump vs Centrifugal Pump |work= Dyna Flow Engineering |accessdate= 30 April 2021 |archive-date= 30 April 2021 |archive-url= https://web.archive.org/web/20210430213419/http://dynafloweng.com/regenturbinepumps.html |url-status= dead }}</ref>