In this study, the flow characteristics at the front and the rear side of the diffuser installed in the AHU for Offshore HVAC system were studied. Set up the rectangular prism of which height is H at diffuser inlet duct, the flow control methods were considered using PIV and CFD numerical analysis. Average flow velocity was increased by 37% and the degree of flow uniformity was 96.7% at x/H =1.5.

In this study, we have modeled a subsonic diffuser with rectangular prism and tried to investigate the influence of a turbulent wake flow by numerical simulation using computational fluid dynamics based on steady-state Navier-Stokes equation and standard k-ε model. A commercial CFD program, FLUENT, is used on the analysis. The turbulent wake is generated by a rectangular prism, which is installed at the diffuser. Flow Uniformity Showed the best results in the case of AR=1:1 and tended to be uniform in the critical point at Re=8.8×103