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This investigation is aimed at studying the flow and velocity characteristics in an annular diffuser fitted with square twisted hub for different geometries. The study was numerically performed. The formulation was based on the steady-state Reynolds averaged Navier–Stokes equations with two-equation turbulence models. In this study, the effect of different twisted hub geometries was studied using...
Numerical simulations of temperature distribution in an annular diffuser fitted with helical screw-tape hub and pimpled hub are carried out in this work. Three twist ratios (Y/H) 4, 6 and 8 for the helical screw-tape hub and three twist ratios (Y/H) 4.5, 5.7 and 8 for the pimpled hub are numerically analyzed and compared. The geometry of the annular diffuser and the inlet condition for both hub configurations...
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