INTERACTION OF 2 OPPOSITE CONICAL CURVED WALL JETS

An experimental investigation of a conical flow formed by the interact ion of two asymmetric turbulent curved wall jets past a circular cone is presented. Measurements were made of velocity and turbulence intens ity profiles of the two jets in the wall jet, the interaction, and the merged jet regions. The location of the interaction region of the two opposing curved wall jets and the flow direction of the merged jet we re found to depend primarily on the ratio of the slot exit velocities of the two jets. The mean velocity and streamwise turbulence intensity profiles of the merged jet were similar to those in a turbulent free jet. Regardless of jet-exit velocity ratios, self-similar mean velocit y profiles for different values of downstream location prevails up to the beginning of interaction region. The streamwise and lateral turbul ence intensities increase with increasing the streamwise distance up t o the interaction region, where the turbulence behavior becomes random and is characterized by larger peak values of the turbulence intensit y compared to wall jet region. The maximum velocity decay and jet half -width growth increased parabolically with streamwise distance. No sig nificant effect of conical shape was observed. Surface flow visualizat ion was carried out for several exit jet velocity ratios. Three dimens ionality was seen to be reduced as the secondary jet momentum increase s.