S054082 Flow Characteristics of a Plane Jet with Deflectors inside the Nozzle

The flow characteristics of a plane air jet have been investigated experimentally. Two deflectors were installed inside of plane nozzle. The effects of the slant angle of deflectors on the mean and fluctuating velocities were examined by means of hot-wire measurements. The operating velocity of the jet was fixed at 7.4 m/s. The slant angles of deflectors (divergent deflector, convergent deflector and parallel plate) were changed at a = ・-, 0- and 6-. In the case of the plane jet with the divergent deflector, the outer jet was accelerated and the inner jet was decelerated inside of the nozzle. The spread of plane jet with the divergent deflector increased in the near field of jet. On the other hand, in the case of the plane jet with the convergent deflector, the outer jet was decelerated and the inner jet was accelerated. The spreads of plane jet with the convergent deflector was smaller than the other jet.