V-shaped hot wire. 2nd report Turbulence measurements.

The Hot - wire Anemometer for Turbulence Measurements part III

Hot-Wire Attenuation and Its Correction in Turbulence Measurements

A scheme is proposed for correcting the hot-wire attenuation in turbulence measurements in both frequency and time domains. The scheme is tested for simulated hot-wire signals under velocity impulse and sinusoidal perturbations of various frequencies. It is found that the frequency response of the hotwire system and the calculated central moments, after applying the correction, can be greatly i...

The Influence of Spatial Resolution due to Hot-Wire Sensors on Measurements in Wall-Bounded Turbulence

Reassessment of compiled data reveal that recorded scatter in the hot-wire measured near-wall peak in viscous-scaled streamwise turbulence intensity is due in large part to the simultaneous competing effects of Reynolds number and viscous-scaled wire-length l ( lUτ ν, where l is the wirelength, Uτ is friction velocity and ν is kinematic viscosity). These competing factors can explain much of th...

Spatial resolution correction for hot-wire anemometry in wall turbulence

We investigate spatial resolution issues in hot-wire anemometry measurements of turbulence intensity and energy spectra. Single normal hot-wire measurements are simulated by means of filtering direct numerical simulation (DNS) of turbulent channel flow at Res 1⁄4 934. Through analysis of the two-dimensional energy spectra from the DNS, the attenuation of the small-scale energy levels is documen...

Hot-wire spatial resolution issues in wall-bounded turbulence

N. HUTCHINS, T. B. NICKELS, I. MARUSIC and M. S. CHONG Journal of Fluid Mechanics / Volume 635 / September 2009, pp 103 ­ 136 DOI: 10.1017/S0022112009007721, Published online: 10 September 2009 Link to this article: http://journals.cambridge.org/abstract_S0022112009007721 How to cite this article: N. HUTCHINS, T. B. NICKELS, I. MARUSIC and M. S. CHONG (2009). Hot­wire spatial resolution issues ...