impeller

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impeller

[im′pel·ər]
(mechanical engineering)
The rotating member of a turbine, blower, fan, axial or centrifugal pump, or mixing apparatus. Also known as rotor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

impeller

impeller
The rotating member in a pump consisting of a disk with vanes attached to it; moves liquid by accelerating the liquid radially outward.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

impeller

impeller
impeller
impeller
i. A part of a gas turbine engine used in the compressor section. It consists of a forged disc with radially opposed vanes on one or both sides, forming a convergent passage in conjunction with the compressor casing.
ii. A device that imparts motion to a fluid; specifically, in a centrifugal compressor, a rotary disc that is faced on one or both sides with radial vanes and accelerates the incoming fluid outward into a diffuser. Also called an impeller wheel.
iii. A vaned disc, which picks up and accelerates the air outwardly to increase the pressure in a supercharger of a reciprocating engine.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
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.
In the rotor frame, it is generally believed that the nonuniform flow field at the impellers outlet caused by wake effect and blade loading generates a periodic flow pattern.
Total hydraulic loss ([H.sub.t]) and impeller hydraulic loss ([H.sub.im]), which were obtained from the numerical simulations of the impellers with different diameters, are shown in Figure 10.
Tony Price explained his company has conducted extensive accelerated wear tests on impellers at its laboratory, and observed that grey iron and stainless steel wore at approximately the same rate; 2mm in 50-63 hours of accelerated testing.
Having costed the various proposals from the Sulzer engineers, the client selected changes to the impellers while choosing to hold off on the remaining improvements for the present time.
The fan testing apparatus, shown in Figure 2, allowed for the flow rate through the impeller to be restricted and the pressure just upstream of the impeller to be measured.
Globe Marine Run-dry[R] Impeller Model #270 is made with a brass core and is designed for water transfer applications.
The aim is to determine the power required turning the impeller in a biodiesel production stirred tank reactor, mechanical design of an agitator such as stress analysis by analytical method and numerical one (finite element method) and compare the result of both methods.
It can be seen from Table 4 that the highest effects among the four factors are type of mixer at Level 1, impeller speed at Level 1, impeller clearance at Level 1, and sampling time at Level 3.
* Self-tightening impellers that reduce leaks and failures
Chen and Chen (1999) found that, at the high [k.sub.La] level, the mass transfer coefficients obtained using the concave-blade impellers are slightly higher than those using the Rushton impeller under the same gassed power level and aeration rate.
Omanpumps, the leading pumps and pumping systems company, launched Grundfos Sewage pump with 'S' Tube impeller at a Seminar held on 12th June at Grand Hyatt.