Turbulence characteristics in rooms ventilated with a high velocity jet.

The measurements reported in this paper were carried out in a mock up of an office room, ventilated by a commercial supply air terminal consisting of 84 nozzles (characteristic dimension SqRoot of As = 0.0975 m). The test room configuration was identical to the one used within the IEA Annex 20 work. Results from isothermal supply is reported. A constant-temperature hot-film anemometer with fast dynamic response was used torecord the instantaneous velocities. The following parameters were recorded: Mean velocity; Standard deviation (relative turbulence intensity); Turbulent integral length scale and microscale. The turbulent length scale was derived from the autocorrelation function.