ON THE COHERENCE OF GRID-GENERATED TURBULENCE

A theoretical approach has been presented which allows the coherence function to be calculated from any arbitrary power spectrum assuming the turbulence is homogeneous and isotropic. This is a first step towards developing realistic models of the coherence function for atmospheric turbulence. Comparisons between theory and experiment in the special case of grid generated turbulence agree reasonably well quantitatively. Furthermore, they illustrate the important roles of the macro- and micro-scales in any analytical model. An understanding of the atmospheric coherence function for use in the analysis of the dynamic response of instrumentation or slender structures. /Author/TRRL/

• Corporate Authors:

  National Physical Laboratory, England

  Queens Road
  Teddington, Middlesex,   England 
• Authors:
  • Roberts, J B
  • Surry, D
• Publication Date: 1973-4

Language

• English

Media Info

• Features: Figures; References;
• Pagination: 52 p.

Subject/Index Terms

• TRT Terms: Aerodynamics; Analysis; Atmospheric interference; Dynamic loads; Electrical grids; Instrumentation; Mathematical models; Turbulence
• Uncontrolled Terms: Dynamic response
• Old TRIS Terms: Analytical method; Coherence /physical/
• ITRD Terms: 5492: Aerodynamics; 6155: Apparatus (measuring); 3355: Engineering structure; 4094: Grid; 6473: Mathematical model; 5408: Speed; 2554: Wind
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00132638
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Rpt. No. R-108 Monograph
• Files: ITRD, TRIS
• Created Date: Nov 9 1977 12:00AM