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Heat transfer in a radially rotating smooth-walled tube

  • W.D. Morris (a1) and S.W. Chang (a2)

Summary

This paper describes a detailed experimental investigation of turbulent heat transfer in a radially rotating tube with particular reference to its application to the design of cooled turbine rotor blades. The paper focuses on the strategy adopted, the description of the apparatus used, the method of data processing and a selection of measurements which illustrate the manner by which Coriolis force and centripetal buoyancy force interactively affect the local heat transfer along the leading and trailing edges of the tube.

As well as re-confirming the fact that Coriolis force and centripetal buoyancy have a significant influence on the forced convection mechanism present due to the through flow, a number of new experimentally-based observations are presented. An empirical correlation, which is physically consistent, has been developed which permits the interactive effect of Coriolis force and centripetal buoyancy on forced convection to be evaluated and quantified.

The work has been motivated by the need to understand the general effect of rotation on the performance of the internal cooling airways used in gas turbine rotor blades.

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References

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1. Morris, W.D. Heat Transfer in Rotating Coolant Channels, Research Studies Press, John Wiley and Sons, 1981.
2. Barua, S.N. Secondary flow in a rotating straight pipe, Proc Royal Soc,A 227,133,1955.
3. Mori, Y. and Nakayama, W. Convective heat transfer in rotating radial circular pipes (1st Report — Laminar Region), Int J Heat and Mass Transfer, 1968, II, 1027.
4. Benton, J.S. and Boyer, D. Flow through a rapidly rotating conduit of arbitrary cross-section, J Fluid Mech, 1969,26, Part I.
5. Ito, H. and Nanbu, K. Flow in rotating straight pipes of circular cross-section, Trans, ASME, J Basic Eng, 1971,93 (3), p 383.
6. Johnston, J.P., Halleen, R.M. and Lezius, D.K. Effects of spanwise rotation on the structure of two-dimensional fully developed turbulent channel flow, J Fluid Mech, 1972, 56, pp 537557.
7. Lokai, V.I. and Limanski, A.S. Influence of rotation on heat and mass transfer in radial cooling channels of turbine blades, Izvestiya VUZ, Aviatsionnya Tekhika, 1975,18, (3), p 69.
8. Metzger, D.E. and Stan, R.L. Entry region heat transfer in rotating radial tubes, AIAA 15th Aerospace Sciences Meeting, Los Angeles, Paper 77-189, 1977.
9. Skiadaressis, D. and Spalding, D.B. Heat transfer in a pipe rotating about a perpendicular axis, ASME Paper 77-WA/HT-39, 1977.
10. Zysina-molozken, L.M., Dergach, A.A. and Kogan, G.A. Experimental investigation of heat transfer in a radially rotating pipe, HGEEE High Temp, 1977,14, 988.
11. Morris, W.D. and Ayhan, T. Observations on the influence of rotation on heat transfer in the coolant channels of gas turbine rotor blades, Proc Inst Mech Eng, 1979,193, (21), p 303.
12. Morris, W.D. and Ayhan, T. Experimental study of turbulent heat transfer in a tube which rotates about an orthogonal axis, Proc XIV ICHMT Symposium on Heat and Mass Transfer in Rotating Machinery, Dubrovnik, Yugoslavia, 30 August-3 September 1982.
13. Iskakov, K.M. and Trushin, V.A. The effect of rotation on heat transfer in the radial cooling channels of turbine blades, Teploenergetika, 1985, 32, (2), pp 5255.
14. Medwell, J.O., Morris, W.D., Xia, J.Y. and Taylor, C. An investigation of convective heat transfer in a rotating coolant channel, ASME Gas Turbine and Aeroengine Congress and Exposition, 11-14 June 1990, Brussels, Belgium.
15. Taylor, C, Xia, J.Y., Medwell, J.O. and Morris, W.D. Finite element modelling of flow and heat transfer in turbine blade cooling, Proc Euro-pean Conference on Turbomachinery, 19-20 March 1991, London, UK.
16. Morris, W.D. and Salemi, R. An attempt to experimentally uncouple the effect of Coriolis and buoyancy forces on heat transfer in smooth circular tubes which rotate in the orthogonal mode, Trans ASME, J Turbomachinery, 1991,114, pp 858864.
17. Morris, W.D. and Chang, S.W. TO be published, Int J Heat and Mass Trans, 1996.
18. Dittos, F.W. and Boelter, L.M.K. Calif Pubs, Eng, 1930, 2, p 443.
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The Aeronautical Journal
  • ISSN: 0001-9240
  • EISSN: 2059-6464
  • URL: /core/journals/aeronautical-journal
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