Abstract
Experimental data are reported for fully developed turbulent flow in a right triangular duct with internal angles of 60 and 30 deg. This duct geometry has no symmetry planes and as such generates a type of non-circular duct flow for which data are scarce. Measurements are made with hot-wire anemometry in an air flow rig specifically constructed for the tests. The friction factor characteristic and axial velocity contours and profiles are presented, together with contours and/or profiles of turbulence intensity, turbulence kinetic energy and the Reynolds shear stresses. Where appropriate, comparisons of the profiles are made with data from measurements in other duct geometries. The presence and influence of turbulence driven cross-plane secondary flow is clearly evident and the implied circulations follow the pattern expected from previous measurements in other ducts.
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