Hostname: page-component-848d4c4894-wg55d Total loading time: 0 Render date: 2024-06-13T06:06:15.700Z Has data issue: false hasContentIssue false
  • English
  • Français

Measurements of intermittency of turbulent motion in a boundary layer

Published online by Cambridge University Press:  28 March 2006

V. A. Sandborn
V. A. Sandborn
Affiliation:
Lewis Research Center, National Aeronautics and Space Administration, Cleveland, Ohio
Get access Rights & Permissions [Opens in a new window]

Abstract

Previous observations of turbulent motion at large wave-numbers have revealed the existence of an uneven distribution of turbulent energy. The spotty distribution of the turbulent motion at high wave-numbers is here studied experimentally for the turbulent boundary layer. The high wave-number intermittency is observed at all locations through and along the boundary layer from near transition to near separation.

The flatness factors for the longitudinal turbulent component at different wave-numbers are measured to give a quantitative value for the intermittency at particular wave-numbers. Upstream of the separation region the flatness factors are found to depend on wave-number and longitudinal distance, but not on the distance from the wall. It appears that the intermittency develops in the transition region and does not diminish very rapidly with distance downstream. Near separation the flatness factors change radically in distribution near the wall, and are there no longer independent of distance from the wall.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 6 , Issue 2 , August 1959 , pp. 221 - 240
Copyright
© 1959 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

Batchelor, G. K. 1953 The Theory of Homogeneous Turbulence. Cambridge University Press.
Batchelor, G. K. & Townsend, A. A. 1949 The nature of turbulent motion at large wave-numbers. Proc. Roy. Soc. A, 199, 238.Google Scholar
Einstein, H. A. & Li, H. 1955 Shear transmission from a turbulent flow to its viscous boundary sub-layer, ch. XIII. Heat Transfer and Fluid Mech. Inst.
Hama, F. R., Long, J. D. & Hegarty, J. C. 1956 On transition from laminar to turbulent flow. Tech. Note BN-81, TN-56-381. Inst. Fluid Dynamics and Appl. Math., Univ. Maryland. (Contract AF-18(600)-1014.)Google Scholar
Homann, F. 1936 Einfluss grosser Zähigkeit bei Strömung um Zylinder. Forsch. IngWes., Bd. 7, Heft 1.Google Scholar
Klebanoff, P. S. 1955 Characteristics of turbulence in a boundary layer with zero pressure gradient. NACA Rep. 1247 (supersedes NACA TN 3178).Google Scholar
Kline, S. J. 1957 Some new conceptions on the mechanism of stall in turbulent boundary layers. J. Aero. Sci. 24, no. 6.Google Scholar
Kline, S. J. & Runstadler, P. W. 1958 Some preliminary results of visual studies on the flow model of the wall layers of the turbulent boundary layer. Rep. MD-3 Dep. Mech. Eng., Standford Univ. (Contract AF 49(638-295.)Google Scholar
Laurence, J. C. & Landes, L. G. 1952 Auxiliary equipment and techniques for adapting the constant-temperature hot-wire anemometer to specific problems in air-flow measurements. NACA TN 2843.Google Scholar
Sandborn, V. A. 1953 Preliminary experimental investigation of low-speed turbulent boundary layers in adverse pressure gradients. NACA TN 3031.Google Scholar
Sandborn, V. A. 1955 Experimental evaluation of momentum terms in turbulent pipe flow. NACA TN 3266.Google Scholar
Sandborn, V. A. & Slogar, R. J. 1955a Study of the momentum distribution of turbulent boundary layers in adverse pressure gradients. NACA TN 3264.Google Scholar
Sandborn, V. A. & Slogar, R. J. 1955b Longitudinal turbulent spectrum survey of boundary layers in adverse pressure gradients. NACA TN 3453.Google Scholar
Sandborn, V. A. & Braun, W. H. 1956 Turbulent shear spectra and local isotropy in the low-speed boundary layer. NACA TN 3761.Google Scholar
Schubauer, G. B. & Klebanoff, P. S. 1956 Contributions on the mechanics of boundary-layer transition. NACA Rep. 1289 (supersedes NACA TN 3489).Google Scholar
Townsend, A. A. 1947 The measurement of double and triple correlation derivatives in isotropic turbulence. Proc. Camb. Phil. Soc. 43, 560.Google Scholar
Townsend, A. A. 1948 Local isotropy in the turbulent wake of a cylinder. Austr. J. Sci. Res. 1, 161.Google Scholar
Townsend, A. A. 1956 The Structure of Turbulent Shear Flow. Cambridge University Press.
Weske, J. R. 1957 Experimental study of detail phenomena of transition in boundary layers. Tech. Note BN-91, TN-57-62. Inst. Fluid Dynamics and Appl. Math., Univ. Maryland (Contract AF-18(600)-893).Google Scholar