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The measurements of drag resulting from small surface irregularities immersed in turbulent boundary layers

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Abstract

Different methods for measuring the drag of small two-dimensional surface irregularities are considered. The pressure distribution technique is employed to measure the drag of small backward-facing steps in six different free stream pressure gradient flows. Results obtained show that Gaudet and Johnson's logarithmic drag coefficient relationship for zero pressure gradient is valid over a wide range of pressure gradients.

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References

  • Abd Rabbo, M. F. 1976: The aerodynamic drag of ridge arrays in adverse pressure gradients. Ph.D. Thesis, Leicester University, UK

    Google Scholar 

  • Coles, D. E.; Hirst, E. A. (eds.) 1969: Proceedings computation of turbulent boundary layer 1968. AFOSR-IFP-Stanford Conference, Vol. 2, pp. 47-54. Thermoscience Division, Stanford University

  • East, L. F.; Sawyer, W. G.; Nash, C. R. 1979: An investigation of the structure of equilibrium turbulent boundary layers. RAE Tech. Rep. 79040, UK

  • Gaudet, L.; Johnson, P. 1970: Measurements of the drag of various two-dimensional excrescences immersed in turbulent boundary layers at Mach numbers between 0.2 and 2.8. RAE. Tech. Rep. 70190, UK

  • Gaudet, L.; Winter, K. G. 1973: Measurements of the drag of some characteristic aircraft excrescences immersed in turbulent boundary layers. AGARD Conference Proc. No. 124, Paper 4

  • Good, M. C.; Joubert, P. N. 1968: The form drag of two-dimensional bluff plates immersed in turbulent boundary layers. J. Fluid Mech. 31, Part 3, pp. 547

    Google Scholar 

  • Lacey, J. 1974: The aerodynamic drag of square ridges. M. Sc. Thesis, Leicester University, UK

    Google Scholar 

  • Nigim, H. H. M. 1981: Effect of small isolated roughness elements on turbulent boundary layers. Ph.D. Thesis Leicester University, UK

    Google Scholar 

  • Nigim, H. H. M.; Cockrell, D. J. 1984: Effect caused by small discrete two-dimensional roughness elements immersed in turbulent boundary layers. J. F. M. (to be publ.)

  • Pallister, K C. 1974: Wind tunnel measurements of the transonic drag of excrescences immersed in a turbulent boundary layer. ARA Rep. No. 37, UK

  • Perry, A. E.; Schofield, W. H.; Joubert, P. N. 1969: Rough wall turbulent boundary layers. J. F. M. 37, 383

    Google Scholar 

  • Young, A. D.; Paterson, J. H. 1981: Aircraft excrescence drag. AGARDograph No. 264

  • Wieghardt, K. 1946: Increase of the turbulent frictional resistance caused by surface irregularities. MAP R & T 103, UK

    Google Scholar 

  • Winter, K. G. 1977: An outline of the techniques available for measurement of skin friction in turbulent boundary layers. Prog. Aerospace Sci. 18, 1

    Google Scholar 

  • Winter, K G.; Gaudet, L. 1967: A programme of tests on drag of excrescences proposed for the 8 ft × 8 ft wind tunnel and a brief analysis of some previous measurements. R. A. E. Tech. Mem. Aer. 1005, UK

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Authors and Affiliations

  1. Engineering Department, Leicester University, LEI 7RH, Leicester, England

    M. G. Higazy & D. J. Cockrell

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  1. M. G. Higazy
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  2. D. J. Cockrell
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Higazy, M.G., Cockrell, D.J. The measurements of drag resulting from small surface irregularities immersed in turbulent boundary layers. Experiments in Fluids 2, 197–202 (1984). https://doi.org/10.1007/BF00571865

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  • DOI: https://doi.org/10.1007/BF00571865

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