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In this study, the effects of the headbox nozzle convergence angle and the slice geometry on the jet angle and trajectory profile are examined. Two-dimensional simulations of a turbulent jet leaving a converging headbox nozzle have been performed and then compared with the data from pilot paper machine trials.
The computational results are in excellent agreement with the measured data of the jet angle for various operating conditions. The headbox nozzle convergence and the slice geometry can have significant influences on the overall jet angle and the resultant location where the jet lands on the forming fabric. The predicted contraction coefficients of the jets are provided.
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Jet Trajectory from a Converging Nozzle, 1997 Engineering Conference Proceedings
