Air distribution in a classroom at various supply diffuser operation modes

The paper presents the computed data on air distribution in a test classroom with four ceiling diffusers supplying several interacting jets. Results of Unsteady Reynolds-Averaged Navies-Stokes (URANS) simulation under isothermal conditions are considered. The main objective of the study is the evaluation of the effect of supply diffuser operation mode on the flow structure and thermal comfort parameters. The paper presents the validation of the computed data by means of comparison with the full-scale measurement results obtained with omnidirectional thermo-anemometric sensors under summer conditions with no occupants. Assessment of draught rate in the occupied zone is presented and discussed.