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Research Papers

# Calculation of the Time-Averaged Flow in Squirrel-Cage Blowers by Substituting Blades With Equivalent Forces

[+] Author and Article Information
Markus Tremmel

Neurosurgery Department, University at Buffalo, 437 Biomedical Research Building, Buffalo, NY 14214mtremmel@buffalo.edu

Dale B. Taulbee

MAE Department, University at Buffalo, 315 Jarvis Hall, Buffalo, NY 14260trldale@eng.buffalo.edu

Center for Computational Research, University at Buffalo, 701 Ellicott St., Buffalo, New York, 14203.

J. Turbomach 130(3), 031001 (Apr 01, 2008) (12 pages) doi:10.1115/1.2775483 History: Received May 16, 2006; Revised April 08, 2007; Published April 01, 2008

## Abstract

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Copyright © 2008 by American Society of Mechanical Engineers
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## Figures

Figure 20

Vin=1.5m∕s, flow field in the yz plane; (a) Velocity V⃗¯, (b) static pressure p¯

Figure 19

Vin=1.5m∕s, flow field in the midspan plane; (a) Velocity V⃗¯, (b) total pressure pt¯

Figure 18

Vin=4.5m∕s, flow field in the yz plane; (a) Velocity V⃗¯, (b) static pressure p¯

Figure 17

Vin=4.5m∕s, flow field in the midspan plane; (a) Velocity V⃗¯, (b) total pressure pt¯

Figure 16

Pressure coefficient results

Figure 15

Torque coefficient results

Figure 14

Grid for g-car fan (inlet region not shown)

Figure 13

Total pressure coefficient from 2D channel, effect of blade thickness

Figure 12

Torque coefficient from 2D channel, effect of blade thickness

Figure 11

Total force distribution in 2D channel at qin′=4.2m2∕s; (a) Radial component Ftot(r), (b) tangential component Ftot(θ)

Figure 10

Fluctuation force distribution in 2D channel at qin′=4.2m2∕s; (a) Radial component Fflu(r), (b) tangential component Fflu(θ)

Figure 9

Inviscid force distribution in 2D channel at qin′=4.2m2∕s; (a) Radial component Finv(r), (b) tangential component Finv(θ)

Figure 8

2D channel flow field, qin′=4.2m2∕s, win=200%; (a) Relative velocity V⃗, (b) static pressure p

Figure 7

2D channel flow field, qin′=4.2m2∕s, win=100%; (a) Relative velocity V⃗, (b) static pressure p

Figure 6

2D channel flow field, qin′=4.2m2∕s, win=0%; (a) Relative velocity V⃗, (b) static pressure p

Figure 5

Equivalent 2D periodic machine (rotating domain, schematic)

Figure 4

Cut in z plane through time-averaged 3D blower, top view (schematic)

Figure 3

Blade geometry of g-car fan, top view (schematic)

Figure 2

Vertical cross section of g-car fan (schematic)

Figure 1

Horizontal cross section of g-car fan (schematic)

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