Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-19T00:20:12.783Z Has data issue: false hasContentIssue false
  • English
  • Français

An experiment on the stability of hypersonic laminar boundary layers

Published online by Cambridge University Press:  28 March 2006

Anthony Demetriades
Anthony Demetriades
Affiliation:
Guggenheim Aeronautical Laboratory, California Institute of Technology Pasadena, California
Get access Rights & Permissions [Opens in a new window]

Abstract

An experimental investigation of the hydrodynamic stability of the laminar hypersonic boundary layer was carried out with the aid of a hot-wire anemometer. The case investigated was that of a flat surface at zero angle of attack and no heat transfer.

The streamwise amplitude variation of both natural disturbances and of disturbances artifically excited with a siren mechanism was studied. In both cases it was found that such small fluctuations amplify for certain ranges of frequency and Reynolds number Rθ, and damp for others. The demarcation boundaries for the amplification (instability) zone were found to resemble the corresponding limits of boundary-layer instability at lower speeds. A ‘line of maximum amplification’ of disturbances was also found. The amplification rates and hence the degree of selectivity of the hypersonic layer were found, however, to be considerably lower than those at the lower speeds. The disturbances selected by the layer for maximum amplifications have a wavelength which was estimated to be about twenty times the boundary-layer thickness δ.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 7 , Issue 3 , March 1960 , pp. 385 - 396
Copyright
© 1960 Cambridge University Press

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

Demetriades, A. 1958 An experimental investigation of the stability of the laminar hypersonic boundary layer. GALCIT Hypersonic Research Project, Memorandum, no. 43.Google Scholar
Dunn, D. W. & Lin, C. C. 1955 On the stability of the laminar boundary layer in a compressible fluid. J. Aero. Sci. 22, no 7, 455–77.Google Scholar
Heisenberg, W. 1924 Ann. Phys. 74, 577–627.
Korkegi, R. H. 1954 Transition studies and skin friction measurements on an insulated flat plat at a hypersonic Mach number. GALCIT Hypersonic Wind Tunnel Memorandum, no. 17.Google Scholar
Kovasznay, L. S. G. 1954 Turbulence measurements. Article in Princeton Series Handbook on High-Speed Aerodynamics and Jet Propulsion, 9, 213–76. New Jersey: Princeton.
Laufer, J. & McClellan, R. 1953 Measurements of heat transfer from fine wires in supersonic flows. External Publication, Jet Propulsion Laboratory. California Institute of Technology, Pasadena, California, no. 315.
Laufer, J. & Vrebalovich, T. 1956 Experiments on the instability of a supersonic boundary-layer. External Publication, Jet Propulsion Laboratory. California Institute of Technology, Pasadena, California, no. 350.
Lees, L. & Lin, C. C. 1946 Investigations of the stability of the laminar boundary-layer in a compressible fluid. NACA TN 1115. Washington, D.C.
Lees, L. 1947 The stability of the laminar boundary layer in a compressible fluid. N A C A Report 876. Washington, D.C.
Liepmann, H. W. 1943 Investigations on laminar boundary layer stability and transition on curved boundaries. NACA ACR no. 3H30. Washington, D.C.Google Scholar
McMahon, H. M. 1958 An experimental study of the effect of mass injection at the stagnation point of a blunt body. GALCIT, Hypersonic Research Project, Memorandum, no. 42.Google Scholar
Morkovin, M. V. 1956 Fluctuations and hot wire anemometry in compressible flows. AGARDograph, no. 24, NATO, AGARD.Google Scholar
Rayleigh, Lord Scientific Papers. Vol. 1, pp. 474–87 (1880); vol. 3, pp. 17–23 (1887); vol. 3, pp. 575-84 (1892); vol. 4, pp. 203-9 (1895) vol. 6, p. 917 (1913). Cambridge University Press.
Reshotko, E. 1959 (Private communication.)
Schubauer, G. B. & Skramstad, H. K. 1948 Laminar boundary layer oscillations and transition on a flat plate. NACA TR 909, Washington, D.C.
Tietjens, O. 1925 Z. angew. Math. Mech. 5, 200–17.
Tollmien, W. 1930 Proceedings of the 3rd International Congress on Applied Mechanics, Stockholm, vol. 1, pp. 105–8.