CONTROL OF SEPARATING FLOW BEHIND A STEP BY MEANS OF SLOTTED RIBS

One of the promising and simplest methods of passively controlling separating flow behind a backward-facing step with the aid of slotted ribs is considered. The size and number of slots were varied in wide ranges in experiments so that the relative area of the slots amounted to R = Fs/Fr = 0–1. The influence of the longitudinal vortices induced by the teeth in a rib on the distribution of pressure and heat transfer rate in the recirculation region in the case of varying the sizes of slots in a rib, the spacing between them, and the position of the rib relative to the backwardfacing step has been studied. The effectiveness of using slotted ribs for reducing the length and intensity of the region of reverse fl ow behind the step is shown.
   
Author:  A. Yu. D′yachenko, V. L. Zhdanov, Ya. I. Smul′skii, and V. I. Terekhov
Keywords:  backward-facing step, separating turbulent fl ow, miniturbulators, thermographic visualization, vortex formation.
Page:  541