3548 -- Detailed Measurements of Room Air Distribution for Evaluating Numerical Simulation Models PDF

Two-dimensional isothermal and non-isothermal air flows were measured in a full-scale room (24 ft X 18 ft X 8 ft). Measurements included the flow patterns of the room air, the profiles of air velocity and turbulent kinetic energy at the diffuser, and velocities, turbulent kinetic energies, and temperatures at 205 locations within the room. The measurement grid was non-uniform, with higher grid density in flow regions where relatively high velocity gradients were expected (e.g., the diffuser jet region). The data show the effects of sampling rates and sampling periods on the experimental results, the effects of internal heat load on the air flow pattern, as well as the occupied region in terms of turbulent kinetic energy and power spectrums. Such detailed measurements are useful for evaluating numerical simulation models as well as for understanding the behaviour of the room ventilation air flows.

KEYWORDS: measuring, rooms, air distribution, calculating, isothermal, air flow, temperature, sampling, heat load, ventilation