No abstract

Cavitation self-oscillations are studied, which occurs during liquid flow in a line with two resistances: the first cavitator, which followed by artificial ventilated cavity is formed with an average pressure greater than atmospheric pressure, through the second resistance (nozzle) liquid and gas flow into the atmosphere. Experiments were carried out on a flat jet plant. Through the transparent side walls of the current was videotaped. The possibility of using self-oscillations mode to create periodic pulse jets at the output is being studied. The studies have shown that different frequency modes of self-cycling can be implemented, with the mode of the first or second frequency modes being the most suitable for generating pulse jets. It is shown that at sufficiently high average pressure in the cavity the mode of intermittent liquid outflow from the nozzle is realized. The maximum pressure in the area of collision with the obstacle significantly exceeds both the average pressure of the head and the maximum pressure in the cavity.