Simulation of indoor airflow and temperature field using radial-attached-jet diffuser

The paper presents the characteristic of indoor airflow and thermal environment using radial-attached-jet diffuser as the supply air inlet by means of numerical simulation. Physical model and computational fluid dynamics (CFD) model was developed based on experimental chamber and general indoor properties of air conditioning system. The mathematical model, turbulence model and boundary condition for CFD were discussed and determined. Indoor air velocity field and temperature field of chamber was predicted. The CFD results agree well with the experimental result. By comparing indoor velocity field and temperature field caused by radial-attached-jet diffuser at different operating condition, it is shown that radial-attached-jet diffuser gives uniform airflow and thermal environment. Radial-attached-jet diffuser is more suitable to dedicated outdoor air system (DOAS) for low supply air temperature.