Axial Flow Fans - 1st Edition - ISBN: 9781483227849, 9781483274225

Axial Flow Fans

1st Edition

Design and Practice

Authors: R. A. Wallis
eBook ISBN: 9781483274225
Imprint: Academic Press
Published Date: 1st January 1961
Page Count: 374
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Description

Axial Flow Fans: Design and Practice focuses on the design of axial flow fans and the practices involved in their applications.

The manuscript first offers information on the fluid mechanics of ducted fans, boundary layer and skin friction relations, and aerofoil data for blade design. Discussions focus on flow deflection in cascade of aerofoils, pitching moment, lift, surface roughness in turbulent boundary layers, turbulent boundary layers in pressure gradients, laminar skin friction, viscosity and boundary layers, and similarity and non-dimensional numbers. The text then ponders on vortex flows in ducting and fan, ducts, and introduction to fan design methods.

The book takes a look at the momentum and blade element considerations on free vortex flow of rotor and rotor losses. Topics include momentum considerations, profile drag, tip clearance losses, optimum conditions in terms of the flow and swirl coefficients, pressure relations and velocity vectors, and thrust and torque gradients. Tail fairing design and associated losses, overall efficiencies, torque, thrust, and power, and the design of fan unit with arbitrary vortex flow are also discussed.

The publication is a dependable source of information for engineers and readers interested in the design of axial flow fans and practices involved in their operation.

Table of Contents


1. Introduction

2. Introduction to the Fluid Mechanics of Ducted Fans

3. Boundary Layer and Skin Friction Relations

4. Aerofoil Data for Blade Design

5. Vortex Flows in Ducting and Fan

6. Ducts

7. Introduction to Fan Design Methods

8. Rotor: Momentum Considerations—Free Vortex Flow

9. Rotor: Blade Element Considerations—Free Vortex Flow

10. Rotor Losses

11. Stator Design

12. Stator Losses

13. Tail Fairing Design and Associated Losses

14. Overall Efficiencies

15. Torque, Thrust and Power

16. Design of Fan Unit with Arbitrary Vortex Flow

17. Noise

18. Design Examples

19. Rotor Analysis

20. Stator Analysis and Overall Fan Unit Performance

21. Variable Pitch Rotors and Examples of Fan Analysis

22. Fan Testing

23. Review of Design Assumptions

Appendix: Free Fans

Notation

Tables

References

Index

Details

No. of pages:
374
Language:
English
Copyright:
© Academic Press 1961
Published:
Imprint:
Academic Press
eBook ISBN:
9781483274225

About the Author

R. A. Wallis