Abstract
The results of an experimental three-dimensional flow structure study in flat coplanar channels with mutually intersecting ribs on opposite walls are presented. The measurements were carried out for different angle values between ribs (2β = 60°, 90°, 120°) and Reynolds number variations. In the experiments, a two-component laser Doppler speed meter was used, which makes it possible to measure both averaged and pulsating velocity components. It is shown that a flow structure in vortex cells between ribs varies greatly from a cell location and an angle between ribs. The magnitude of hydraulic losses in coplanar channels significantly exceeds losses in smooth channels, and they increase with increasing angle between ribs.
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