Study of the shape optimization of a tee guide vane in a ventilation and air-conditioning duct

The results show that the resistance reduction rate of the proposed guide vane is 4.3%-263.8% under different flow ratios (5:1-1:3) and different aspect ratios (4:1-1:4) compared with that of a tee without the guide vane. In some cases, the resistance reduction rate exceeds 100%; the mechanism responsible for this phenomenon is also analyzed. The tee with the proposed guide vane reduces deformation of the fluid, the mechanical energy converted to internal energy and turbulent energy dissipation. The study results are verified through a full-scale experiment; the experimental data are in good agreement with the simulated values and the results reported in previous studies.