Numerical analysis of Reynolds stresses for turbulent flow developing is S-shaped diffuser

摘要

A numerical analysis has been carried out for developing turbulent flow in a diffuser with S- shaped centerline at a Reynolds number of 4 x 10~4. The diffuser exit-to-inlet area ratio was 1.5and the inler cross section was square, 40mm x 40mm, and expanded on both curved surfaces to an enit- plane section of 40mm x 60mm. the S-shaped curvature was formed from two 22.5 degree bends of 280mm mean radius of curvature. Straight duct 0.3m and 2, long are attached to the inlet and outlet planes of the S-shaped diffuser, respectively.