Spreading and Development of the Parallel Wall Jet

A description of an experimental investigation of a round air jet projected parallel to a wall and the resulting velocity profiles, maximum velocity decay and the rate of jet growth. This paper concerns an experimental investigation of a round air jet projected parallel to a wall. Experiments were carried out to establish the shape of the velocity profiles, the decay of maximum velocity and the rate of growth of the jet. The results are compared with Tollmien's theory for the free jet. All data are presented in a form readily available for design purposes.