Two-Dimensional and Axisymmetric Jet Flows with Finite Initial Cross Sections

抄録

In addition to the momentum integral equation, the energy integral equation of the boundary layer is used for an approximate calculation of the jet flows issuing from a finite width nozzle and from a finite radius nozzle. The length of the zone of flow establishment, the width or radius of the jets and the center-line velocity are calculated. The eddy kinematic viscosity is assumed to be proportional to both the center-line velocity and the mean width or radius of the jets. This assumption means that the constant contained in the eddy kinematic viscosity is to have a universal constant value. The results of the authors' experiments are compared with the calculations, and the value of the constant involved in the eddy kinematic viscosity is determined.