Abstract
This experimental study aims at investigating the turbulent diffusion mechanism of jets, in particular the relationship between the static pressure and the lateral mean velocity on the development of a two-dimensional air jet. The dimensional jet with three injection velocities (11.7, 23.3 and 35.0m/s) was generated in a two-dimensional wind tunnel. The velocity distributions were measured by X-type hot-wire anemometer. The static pressure distributions were measured by the static pressure probe that was developed in ore laboratory, using a hot-wire anemometer. The result of experiment was that the negative static pressure exists in the turbulent shear layer. It is considered that the entrainment proceed from the negative static pressure by the eddy motion of the turbulent shear layer.
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