抄録
We made an experimental study on the promotion of turbulent thermal mixing of hot and cold airflows in a T-junction with rectangular cross sections, which simulates the HVAC unit used for the automobile air-conditioning system. As a mixing promoter, small jets were blown into the main channel near the upstream edge of the T-junction. Based on the mean temperature distributions measured by a thermocouple rake, the influence of the jets on the mixing was evaluated and the blowing angle of the jets was optimized. It was found that the optimum jet angle was 15 degrees against the main flow and the turbulent thermal mixing could be controlled quite arbitrarily by changing the velocity of the jets.
