Abstract
The structure in an initial mixing region of a two-dimensional curved jet along a circular arc is investigated by measurering the mean velocity, the turbulent intensities, the turbulent shear stress, the terms in the turbulent energy equation and terms in the Reynolds stress transport equation. It is found that the profiles of the rms intensity for the axial fluctuating velocity component and the Reynolds stress exhibit an obvious asymmetry due to the influence of the centrifugal force. By using the measured distribution of the mean velocities and the Reynolds stresses, the curvature factor and the eddy viscosity, which is included in the expression given by Sawyer, are estimated along the jet centerline and it is shown that the Sawyer's expression is somewhat inadequate in the initial mixing region of a two-dimensional curved jet. The profiles of the terms in the turbulent energy equation and the Reynolds stress transport equation also exhibit an obvious asymmetry. However, the generation term and the pressure-strain redistribution term in the Reynolds transport equation exhibit an obvious asymmetry only within the region of about a few slot thicknesses downstream of the nozzle exit and the asymmetry of these terms
Published Version
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