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Internal Aerodynamics Problems

Published online by Cambridge University Press:  04 July 2016

J. L. Livesey
J. L. Livesey*
Affiliation:
University of Manchester
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Summary

This paper defines Internal Aerodynamics and via similarity generalises the concept to include internal flows of fluids other than air.

Variable area ducted flows are considered distinguishing one, two and three-dimensional treatments and the difference between accelerating and diffusing flows is stressed. The design of variable area ducts using ideal inviscid fluid theory, ideal fluid plus boundary layer theory and inviscid but rotational fluid theory is discussed. The success and limitations of these theories with reference to contractions and diffusers is surveyed The particular difficulty of a diffusing flow as affected by entry velocity profile and turbulence is considered.

From the problem of simulating entry velocity profiles arises the need for the generation of required velocity profiles in duct systems. Examples of methods of generation and difficulties are discussed.

Next follows a series of examples of internal flow problems.

The radial flow diffuser is considered as an example of the interaction of viscous and inertia effects. An approximate theoretical treatment is given and the real flow, with the occurrence of reverse transition, is described.

The deliberate production of a reversed flow regime for flame stabilisation is described with reference to a marine boiler register Aspects of pressure drop and stability are considered.

Secondary flow is defined and the origin in the distortion of the upstream vorticity field is described. The case of a strut wall junction is given with details of the downstream flow where the secondary flow produces apparent multiple wakes from a single strut.

Air flow excited vibration of heat exchanger tubes is described. Different mechanisms resulting in transverse or streamwise oscillations and the coupled modes of tube rows are discussed.

Finally the paper emphasises the large available body of information in internal aerodynamics, largely of aeronautical origin, and considers its usefulness and limitations for the problems discussed.

Type
Industrial Aerodynamics
Information
The Aeronautical Journal , Volume 70 , Issue 665 , May 1966 , pp. 565 - 574
Copyright
Copyright © Royal Aeronautical Society 1966

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References

1. Lighthill, M. J. A New Method of Two-Dimensional Aerodynamic Design. ARC R & M 2112, 1945.Google Scholar
2. Goldstein, S. Notes on the Design of Converging Channels. ARC R & M 2643, 1951.Google Scholar
3. Cheers, F. Note on Wind Tunnel Contractions. ARC R & M 2137, 1945.Google Scholar
4. Whitehead, L. G., Wo, L. Y. and Waters, M. H. L. Contracting Ducts of Finite Length. Aeronautical Quarterly, Vol 2, February 1951.CrossRefGoogle Scholar
5. Thwaites, B. On the Design of Wind Tunnel Contractions. Journal of the Royal Aeronautical Society, Vol 55, March 1951.Google Scholar
6. Hughes, N. J. S. Stream Expansion with a Discontinuity in Velocity on the Boundary. ARC R & M 1978, March 1944.Google Scholar
7. Gibbings, J. C. and Dixon, J. R. Two-Dimensional Contracting Duct Flow. Jnl Mechs Appl Maths, Vol 10, 1957.Google Scholar
8. Bloomer, N. T. Notes on the Mathematical Design of Nozzles and Wind Tunnel Contractions. Aeronautical Quarterly, Vol 8, August 1957.Google Scholar
9. Cohen, M. J. and Ritchie, N. J. B. Low Speed Three-Dimensional Contraction Design. Journal of the Royal Aeronautical Society, Vol 66, 1962.Google Scholar
10. Woods, L. C. A New Relaxation Treatment of Flow With Axial Symmetry. ARC FM 1479, 1950.Google Scholar
11. Woods, L. C. Compressible Subsonic Flow in Two-dimensional Channels. Parts I and II. Aeronautical Quarterly, Vol 6, 1955.Google Scholar
12. Patterson, G. N. Modern Diffuser Design. Aircraft Engineering, September 1938.Google Scholar
13. Cockrell, D. J. and Markland, E. A Review of Incompressible Diffuser Flow. Aircraft Engineering, October 1963.Google Scholar
14. Stratford, B. S. The Prediction of the Separation of the Turbulent Boundary Layer. Jnl of Fluid Mechs, Vol. 5, Pt 1, 1959.Google Scholar
15. Stratford, B. S. An Experimental Flow With Zero Skin Friction Throughout Its Region of Pressure Rise. Jnl of Fluid Mechs, Vol 5, Pt 1, 1959.Google Scholar
16. Norbury, J. F. An Approximate Method for the Calculation of Turbulent Boundary Layers in Diffusers. Aeronautical Quarterly, Vol 8, 1957.Google Scholar
17. Ross, D. and Robertson, M. J. An Empirical Method for the Calculation of the growth of a Turbulent Boundary Layer. J Ae Sci, Vol 21, 1954.Google Scholar
18. Ross, D. A New Approach to Turbulent Boundary Layer Problems. Proc ASCE, Vol 81, Separate 604, 1955.Google Scholar
19. Robertson, M. J. and Fraser, H. R. Separation Prediction for Conical Diffusers. Trans ASME, Vol 82, D, 1960.Google Scholar
20. Stratford, B. S. and Tobbs, H. The Maximum Pressure Rise Attainable in Subsonic Diffusers. Journal of the Royal Aeronautical Society, April 1965.Google Scholar
21. Reid, E. G. Performance Characteristics of Plane-Wall Two-dimensional Diffusers. NACA TN 2888, 1953.Google Scholar
22. Kline, S. J., Abbott, D. E. and Fox, R. W. Optimum Design of Straight-walled Diffusers. Trans ASME, Vol 81, D, 1959.Google Scholar
23. Kline, S. J., Moore, C. A. and Cochran, D. C. Wide Angle Diffusers of High Performance and Diffuser Flow Mechanisms. J Ae Sci, Vol 24, No 6, 1957.Google Scholar
24. Bradshaw, P. The Performance of a Diffuser With a Fully Developed Pipe Flow at Entry. Journal of the Royal Aeronautical Society, Vol 67, November 1963.Google Scholar
25. Stratford, B. S. Turbulent Diffuser Flow. ARC Current Paper 307, 1956.Google Scholar
26. Livesey, J. L. and Turner, J. T. The Effect of Velocity Profile Decay on Shear Flow in Diffusers. Int Jnl Mech Sci, Vol 6, 1964.Google Scholar
27. Livesey, J. L., Parker, E. and Iones, P. K. The Production of Duct Velocity Profiles Having High Ratios of Maximum to Mean Velocity. Journal of the Royal Aeronautical Society, Vol 60, 1956.CrossRefGoogle Scholar
28. Morgan, P. G. and Saunders, A. The Production of Peaked Velocity Profiles. Journal of the Royal Aeronautical Society, Vol 65, 1961.Google Scholar
29. Owen, P. R. and Zienkiewicz, H. K. The Production of a Uniform Shear Flow in a Wind Tunnel. Jnl Fluid Mech, Vol 2, Pt 6, 1957.Google Scholar
30. Livesey, J. L. and Turner, J. T. The Generation of Symmetrical Duct Velocity Profiles of High Uniform Shear. Jnl Fluid Mech, Vol 20, Pt 2, 1964.Google Scholar
31. Livesey, J. L., Turner, J. T. and Glasspoole, W. F. The Decay of Turbulent Velocity Profiles. To be Published. Google Scholar
32. Moller, P. S. Radial Flow Without Swirl Between Parallel Discs. Aeronautical Quarterly, Vol XIV, 1963.Google Scholar
33. Moller, P. S. Radial Flow Without Swirl Between Parallel Discs When the Flow is Compressible and Subsonic. McGill University Report, 63-7, 1963.Google Scholar
34. Moller, P. S. Radial Flow Without Swirl Between Parallel Discs Having Both Supersonic and Subsonic Regions. McGill University Report, 63-10, 1963.Google Scholar
35. Livesey, J. L. Inertia Effects in Viscous Flows. Int Jnl Mech Sci, Vol 1, 1960.Google Scholar
36. Livesey, J. L. and South, R. D. Boiler Air Register Pressure Drop Performance With Particular Reference to Quarl Angle, Swirler Position and Reynolds Number. Admiralty Report.Google Scholar
37. Hawthorne, W. R. Secondary Circulation in Fluid Flow. Proc Roy Soc, A, Vol 206, 1951.Google Scholar
38. Scruton, C. Wind Excited Oscillations of Tall Stacks. The Engineer, p 806, June 1955.Google Scholar
39. Livesey, J. L. and Dye, R. C. F. Vortex Excited Vibration of a Heat Exchanger Tube Row. Jnl Mech Eng Sc, Vol 4, No 4, 1962.Google Scholar
40. Dumpleton, O. W. Tube Vibrations: Interim Report on Experiments With Gas Excited Vibrations of Boiler Tubes. ED Report 4EC/1, Babcock & Wilcox Ltd.Google Scholar
41. Roberts, B. W. Ph D Thesis. University of Cambridge, 1962.Google Scholar
42. Putnam, A. A. Flow Induced Noise in Heat Exchangers. Jnl Eng Power, October 1959.Google Scholar
43. Elder, J. W. Steady Flow Through Non-uniform Gauzes of Arbitrary Shape. Jnl Fluid Mech, Vol 5, Pt 3, 1959.Google Scholar