Performance of a Viscous Pump with Radial Pumping Grooves

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Abstract
A disk-type viscous pump with radial pumping grooves on its stator has been previously shown to have linear pressure-flow rate relationships. However, the gradual increase of the working fluid temperature in practice makes the pressure-flow rate relations no longer linear. For this reason, a prototype of such a pump has been retested for rotor speeds ranging from 600 to 1800 rpm, and a few methods for comparing the test data with the analytical predictions have been suggested. The comparisons show very good agreement for all the rotor speeds tested.