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1. One that impels, as a rotating device used to force a fluid in a desired direction under pressure.
2. A rotor or rotor blade.


1. (General Engineering) the vaned rotating disc of a centrifugal pump, compressor, etc
2. (General Engineering) a compressor or centrifugal pump having such an impeller


(ɪmˈpɛl ər)

1. one that impels.
2. a rotor for transmitting motion, as in a centrifugal pump, turbine, or fluid coupling.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.impeller - the blade of a rotor (as in the compressor of a jet engine)impeller - the blade of a rotor (as in the compressor of a jet engine)
vane, blade - flat surface that rotates and pushes against air or water
rotor - rotating mechanism consisting of an assembly of rotating airfoils; "there are horizontal rotors on a helicopter or compressor rotors in a jet engine"
References in periodicals archive ?
Blades as the core part of the pump, which can not only influence the hydraulic performance, but also affect the strength of the impeller. In recent year, plenty of the efforts have been taken in the blade performance optimization.
Measured mass flow ([??]), inlet pressure ([]), inlet temperature ([]), outlet pressure ([P.sub.out]), outlet temperature ([T.sub.out]), and shaft speed ([N.sub.phys]) or impeller tip speed (U, and impeller diameter [D.sub.2]) are used with ratio of specific heats ([gamma]) for air to calculate corrected speed ([N.sub.C]), corrected air flow ([[??].sub.corr]), pressure ratio ([[pi].sub.C]), and isentropic efficiency ([[eta].sub.C]), using Equations 1 through 4.
For cast pump components, and especially for the core and impeller, 3D printing of the sand casting molds now eliminates the need for an entire post-processing step.
The design of desulfurization dust removal centrifugal pump is a single suction impeller: pump specific speed ns = (3.65n [square root of (Q)])/[H.sup.3/4] = 65.95, hydraulic efficiency [[eta].sub.h] = 1 + 0.0835lg(Q/n)1/3 = 0.860, volumetric efficiency [[eta].sub.v] = 1/(1 + 0.68n-2/3) = 0.960, and mechanical efficiency [[eta].sub.m] = 1 - 0.07 (1/ ([n.sub.s]/100)7/6) = 0.886.
* Efficient, high solids passage impeller and volute design, coupled to a high torque 4-pole motor (2, 3 and 5 hp).
The impeller diameter is a crucial design parameter because it can easily affect the performance of pumps [20-23].
During the past several decades, researches have been carried out experimentally and numerically to study the effects of impeller or guide vane geometries and operating conditions on pressure pulsations in a mixed-flow pump.
Being the component with the highest level of contact with transferred liquid, the material used in the impeller is a crucial factor as it is heavily affected by wear and erosion-corrosion.
Large centrifugal impeller compressors are commonplace throughout the petrochemical sector, where they usually operate on a continuous duty basis.
Most J-Series pumps can quickly be converted from High Volume to High Head (or vice-versa) by merely changing the impeller and the suction plate.