Hostname: page-component-6bf8c574d5-w79xw Total loading time: 0 Render date: 2025-02-14T21:19:47.716Z Has data issue: false hasContentIssue false
  • English
  • Français

Experiments on shock stand-off distance in non-equilibrium flow

Published online by Cambridge University Press:  29 March 2006

Peter P. Wegener  and
George Buzyna
Peter P. Wegener
Affiliation:
Department of Engineering and Applied Science, Yale University, New Haven, Connecticut
George Buzyna
Affiliation:
Department of Engineering and Applied Science, Yale University, New Haven, Connecticut
Get access Rights & Permissions [Opens in a new window]

Abstract

An experimental investigation of the non-equilibrium behaviour of the shock stand-off distance ahead of spheres at low supersonic Mach number is reported. An intermittent wind tunnel operating with a reacting gas mixture with one non-equilibrium mode is described. A non-equilibrium parameter after Damköhler is determined for the flow and the experiments cover a range of this variable from near-frozen to near-equilibrium states. The shock stand-off distance is measured and found to vary as expected between these two bounds with a low value at equilibrium. With all other variables governing shock standoff distance held constant, such measurements can also be used to determine the relaxation time of the non-equilibrium mode.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 37 , Issue 2 , 23 June 1969 , pp. 325 - 335
Copyright
© 1969 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

Greenhill, A. G. 1880 Proc. Camb. Phil. Soc. 4, 4.
Greenspan, H. P. 1964 J. Fluid Mech. 20, 673.
Greenspan, H. P. 1965 J. Fluid Mech. 22, 449.
Greenspan, H. P. & Howard, L. N. 1963 J. Fluid Mech. 17, 325.
Haurwitz, B. 1940 J. Mar. Res. 3, 254.
Hough, S. S. 1898 Phil. Trans. A, 186, 297.
Lord, Kelvin 1877 Nature, Lond. 15, 297.
Longuet-Higgins, M. S. 1964 Proc. Roy. Soc. A, 279, 446.
Longuet-Higgins, M. S. 1965 Proc. Roy. Soc. A, 284, 40.
Longuet-Higgins, M. S. 1968 Phil. Trans. A, 262, 511.
Malkus, W. V. R. 1967 J. Fluid Mech. 28, 793.
Roberts, P. H. & Stewartson, K. 1963 J. Fluid Mech. 17, 1.
Rumiantsev, V. V. 1964 Adv. Appl. Mech. 8. London: Academic Press.
Stern, M. E. 1963 Tellus, 15, 246.
Stewartson, K. 1959 J. Fluid Mech. 5, 577.
Stewartson, K. 1967 Proc. Roy. Soc. A, 299, 173.
Whittaker, E. T. & Watson, G. N. 1927 A Course of Modern Analysis, Fourth Edition. Cambridge University Press.