A CONTRIBUTION TO THE THEORY OF JET-WAKES AND VORTICES IN FREE AND CONFINED SURROUNDINGS
MISSISSIPPI STATE UNIV MISSISSIPPI STATE DEPT OF AEROPHYSICS
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Starting with an extensive account of the present ideas and development on the subject flows, the general principles of the motion of a free laminar jet were analyzed and reviewed. From these principles an understanding of the very complex behavior of a turbulent jet was obtained. Using a linearized form of the Navier-Stokes equations of motion, a set of solutions capable of describing the laminar axial, rotational, and radial velocity profiles of a jet was deduced. Next, it was indicated that by introducing a viscosity function to the simplified equations of laminar motion, solutions of the same general analytic form, but with a different nondimensional variable, can be obtained to describe the turbulent motion. On the basis of the presented theoretical analysis and available experimental results, it was concluded that the laws describing jet-wakes and vortices for laminar and turbulent motion are of the same general nature.
- Fluid Mechanics