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Pulsed Hot-Wire Measurements in Two- and Three-Dimensional Wall Jets

Hans Abrahamsson (Institutionen för termo- och fluiddynamik) ; Per-Åge Krogstad ; Lennart Löfdahl (Institutionen för termo- och fluiddynamik) ; B Venås
Experiments in Fluids Vol. 27 (1999), p. 210-218.
[Artikel, refereegranskad vetenskaplig]

Pulsed Hot-Wire Anemometry (PHWA) measurements are performed in well defined two- and three-dimensional turbulent wall jets. For the two-dimensional wall jet the objective is to study reported differences between conventional Hot-Wire Anemometry (HWA) and Laser Doppler Anemometry (LDA) results. In the three-dimensional wall jet, new improved data are provided, employing a measuring technique suitable for highly turbulent flows. This, since only hot-wire results previously have been published for this flow. The pulsed wire results show good agreement with existing Laser Doppler anemometer data in the two-dimensional wall jet, both reporting significantly higher turbulence levels in the outer region of the flow than hot-wires do. The hot-wire anemometer errors generally increase with increasing local turbulence intensity and since the three-dimensional wall jet has a higher turbulence level than its two-dimensional equivalent, the new pulsed hot-wire results improve the information available for the turbulence field in this flow significantly.



Denna post skapades 2010-08-25.
CPL Pubid: 125139

 

Institutioner (Chalmers)

Institutionen för termo- och fluiddynamik (1989-2004)

Ämnesområden

Strömningsmekanik

Chalmers infrastruktur