Hostname: page-component-848d4c4894-r5zm4 Total loading time: 0 Render date: 2024-07-07T13:55:30.717Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effect of Mean Loading on the Fluctuating Loads Induced on Aerofoils by a Turbulent Stream

Published online by Cambridge University Press:  07 June 2016

P.J. Mckeough  and
J.M.R. Graham
P.J. Mckeough
Affiliation:
Department of Aeronautics, Imperial College
J.M.R. Graham
Affiliation:
Department of Aeronautics, Imperial College
Get access

Summary

This paper analyses the unsteady lift produced on a thin aerofoil by an arbitrary three-dimensional gust. In particular, it evaluates the effects of α, the angle of incidence of the aerofoil to the mean stream. A thin aerofoil theory which includes the effects of distortion of the turbulence by the mean flow field of the aerofoil is applied to the case of an aerofoil in isotropic turbulence. Some computed results are compared with measurements made on a NACA 0015 aerofoil in grid turbulence in a wind tunnel. It is shown that for isotropic turbulence the effect of mean incidence on the lift spectrum is of order α2, and is significant at low frequencies for the length scale ratios tested.

Type
Research Article
Information
Aeronautical Quarterly , Volume 31 , Issue 1 , February 1980 , pp. 56 - 69
Copyright
Copyright © Royal Aeronautical Society. 1980

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Batchelor, G.K., The theory of homogeneous turbulence. Cambridge University Press, Chapter 2, p 32, 1953 Google Scholar
2 Batchelor, G.K. and Proudman, I., Quart. J. Mech. Appl. Maths. 7, 83, 1954 Google Scholar
3 Goldstein, M.E. and Atassi, H., J. Fluid Mech. 74, 741, 1976 CrossRefGoogle Scholar
4 Graham, J.M.R., Aero Quart. 21, 182, 1970 CrossRefGoogle Scholar
5 Graham, J.M.R., J. Fluid Mech. 73, 565, 1976 CrossRefGoogle Scholar
6 Horlock, J.H., A.S.M.E. J. Basic Engg. FE-28, 1968 Google Scholar
7 Hunt, J.C.R., J. Fluid Mech., 61, 4, 1973 Google Scholar
8 Jackson, R.,, Graham, J.M.R. and Maull, D.J., Aero Quart. 24, 3, 1973 Google Scholar
9 Kemp, N.H., J. Aero. Sci. 19, 713, 1952 CrossRefGoogle Scholar
10 McKeough, P.J., Effects of turbulence on aerofoils at high incidence. Ph.D. Thesis, London Univ. 1976 Google Scholar
11 Morfey, C., A.S.M.E. J. Basic Engg. 92, 663, 1970 CrossRefGoogle Scholar
12 Mugridge, B., Aero. Quart. 22, 301, 1972 Google Scholar
13 Sears, W., J. Aero. Sci. 8, 104, 1941 Google Scholar