Performance Analysis of a Disk-Type Viscous Pump with Radial Pumping Grooves

Abstract

Engineering AbstractA new disk-type viscous pump, with radial pumping grooves on its stator, is described and its performance analyzed. Its flow rate and discharge pressure relationship is found to be linear. Two proposed viscous pumps of this new design having slightly different dimensions are considered and compared to the recently reported design utilizing multilobes. Analyses on these two proposed pumps show that this new design exhibits higher flow rate characteristics than the recent multilobe design for the same pump size and rotor-stator clearances.

Viscous pumps: Comparative assessment of effectiveness

“…Much different proportions of the shear channel were adopted by Winoto and Yohanand [36], who arranged them as radially extending arms in a disc rotor pump con®guration. Analytical and experimental investigation followed in references [37] and [38].…”

Experimental Study of a Disk-Type Viscous Pump with Radial Pumping Grooves

“…In an attempt to improve the performance characteristics of such pumps, a new disk-type viscous pump utilizing radial pumping grooves on its stator was recently described and analyzed by Winoto and Yohanand (1994), who also cited some other relevant publications and the reasons for the recently growing interest in viscous pumps. The analytical results for this new disk-type viscous pump show higher flow rate characteristics than the multilobe design of Etsion and Yaier (1988) for the same pump size.…”

“…The principle of operation of the new disk-type viscous pump has been described by Winoto and Yohanand (1994), but it is briefly repeated here for clarity and convenience of the readers. Figure l(a) shows the plane view of the pump stator, which is a circular disk.…”

“…The analytical results for this new disk-type viscous pump show higher flow rate characteristics than the multilobe design of Etsion and Yaier (1988) for the same pump size. Based on the analysis of Winoto and Yohanand (1994), a prototype of this new disk-type viscous pump with six radial pumping grooves on its stator was subsequently fabricated and tested, as is described in the following. The objectives of this work are to experimentally study the performance of this new pump and to investigate the practical problems which might be encountered in its operation.…”

“…These two actions will determine the pressure-flow rate relationship. By applying fluid dynamic analysis of an incompressible laminar flow between two parallel surfaces in relative motion, and the necessary simplifying assumptions, the total net flow rate Q into the pumping grooves can be estimated as (Winoto and Yohanand, 1994):…”