Performance characteristics of an electromagnetic pump
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Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.
For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.
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Abstract
The linear induction pump (76 laminations, 0.125-inch duct thickness, 0.319-inch air gap) can produce a maximum no-flow pressure of 0.734 psi and can pump 0.450 gpm against a 0.2 psi head. With an air gap of 0.443 inch and a pump section having a 0.250-inch duct thickness, the maximum no-flow pressure decreases to 0.551 psi, but the improved hydraulic efficiency of the larger duct permits circulation of 0.9 gpm against a 0.2 psi head. The improvement in magnetic field strength from 78 gauss/amp at 0.443 inch air gap to 103 gauss/amp at 0.310 inch air gap indicates the need for minimizing the pump air gap while maintaining a duct thickness consistent with good hydraulic efficiency.