Potential core of an axisymmetric laminar jet. 2nd Report. The effect of a nozzle.

In the preceding paper, the flow pattern in the flow developing region of an axisymmetric laminar water jet has been made clear. The experiments, however, were carried out by using a single nozzle, so that the potential core radius at the nozzle exit was determined only by the jet Reynolds number. In this paper, four nozzles with which the length of straight pipe section differed from each other were used, in order to clarify the effect of the initial jet profile at the nozzle exit on the flow in the flow developing region. The numerical examples obtained from the preceding method were also given. The effects of the supply nozzles on the velocity profile, the centerline velocity, the half-radius and the potential core radius were discussed.