Abstract:
The mean velocity characteristics of turbulent jet interacting with surface standing wave were studied experimentally.The experiments were performed in a square water tank.The turbulent jet was driven by a constant head water tank, and the surface standing wave was generated by a plunger-type wave maker.The jet nozzle was positioned under the antinode of the standing wave.The wave amplitude was measured with a capacitance wave gage and the data acquisition system.The velocity profiles were measured with a laser doppler velocimeter.Based on the measurements, it was concluded that the generated waves were nearly perfect standing waves, and the results of turbulent jets were well consistent with the published one.The measurement results of turbulent jet interacting with surface standing water wave indicated that the velocity profiles of the turbulent jets in the momentum-dominated far field were still Gaussian, the imposition of the wave oscillations was to deform the jet structure from circular to elliptic, and the wave oscillations enhanced greatly on the jet mixing.