SOURCE DISTRIBUTION OF TURBULENT BURSTS DURING NATURAL TRANSITION

The basic statistical properties of the wall pressure field associated with turbulent spots in a transition boundary layer have been measured on a large flat plate test fixture in the Anechoic Flow Facility at the Naval Ship Research and Development Center. The measured statistical properties and the distribution of the turbulent spots on the plate surface are compared with a quantitative formulation of the transition process which was developed by Emmons. An important unknown parameter in Emmons' model of the transition process is the burst source rate density function. This paper considers the consistency between the predicted and measured statistical burst properties when two simple forms of the source rate density function are assumed. Experimental values of the burst rate and average burst length are presented as a function of the intermittency factor. The statistical results are normalized in term of spatial and temporal individual burst properties and compared with the predicted results.

• Corporate Authors:

  Naval Ship Research and Development Center

  Ship Acoustics Department
  Bethesda, MD  United States  20034
• Authors:
  • Farabee, T M
  • Casarella, M J
  • DeMetz, F C
• Publication Date: 1974-8

Media Info

• Features: Figures; References;
• Pagination: 46 p.

Subject/Index Terms

• TRT Terms: Boundary layer; Transitional flow; Turbulence; Turbulent boundary layer
• Old TRIS Terms: Boundary layer stability; Intermittency
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00084455
• Record Type: Publication
• Source Agency: Naval Ship Research and Development Center
• Report/Paper Numbers: SAD-89E-1942
• Files: TRIS
• Created Date: May 7 1975 12:00AM