Measurement of the turbulence intensities in a flat plate boundary layer

Övrigt konferensbidrag, 2003

Detailed information on the flow in the vicinity of the wall is of particular interest for various types of flow and heat transfer predictions and of basic importance for turbulence modelling. The time-averaged value can be determined accurately by a number of methods, however time resolved part is rather more difficult to measure. In this work, the results of measurements of the wall shear stress fluctuations in a turbulent boundary layer are presented. Described experiments are performed for the case of zero-pressure gradient flow on a flat plate at Reynolds number, Reθ, ranging from about 1000 to 6000. A main feature of this work is that the miniature wall mounted hot wires fabricated with very high accuracy were implemented in the measurements.