Abstract
The flow visualization and PIV measurements are carried out for turbulent velocity fields in a T-junction, which models the HVAC unit used in an automobile air conditioning system. The measurements are performed at Reynolds number in the main channel of 2.5×(10)^4 and cross flow velocity ratio ranging from 0.5 to 2. Based on present measured data, the influences of velocity ratio on the flow characteristics after the T-junction are clarified. It has been found that the characteristics of the flow reattachment, the separation bubble and vortex structures at the mixing interface and inside the separation bubble are much influenced by the cross flow velocity ratio.
