The Investigation of the aerodynamic ınteraction problems, jet ınteraction

II ABSTRACT PhD Thesis THE INVESTIGATION OF THE AERODYNAMIC INTERACTION PROBLEMS, JET INTERACTION Haydar EREN Fırat University Graduate School of Natural and Applied Sciences Department of Mechanical Engineering 1995, Page: 127 The aim of this study, is the numerical investigation of the flow field resulting from the interaction of jets. Momentum equations are solved in cartesian coordinates by using a finite difference method. Compressible fluid and unsteady flow is considered. Flow field is computed for different Reynolds numbers for free jet, parallel jets, cross jets, opposite jets. It is shown that the results given for the free jet have a good agreement with the similarity solutions and the experimental results. It is observed that the axial velocity for free jet flowing along x-axis decreases in the jet direction and the jet expands along y- axis. With the increasing Reynolds numbers, while the expansion of the jet along y axis slows down, the distance on which the jet velocity vanishes increases. A similar situation is found to be valid for the parallel jets. In the case of two jets with perpendicularly intersecting flow directions, in the interaction region, the flow is mixed, rotational and negative flow velocities are magnified. For co-axial opposing jets, it is observed that in the center of the interaction region u-velocity component vanishes along a vertical line while v-velocity component increases and consequently the jet expands laterally. KEY WORDS : Jet flow, aerodynamic interaction, jet interaction, free jet, parallel jets, cross jets, opposit jets.