Orthogonal experimental research on the structural parameters of a self-excited pulsed cavitation nozzle

A variety of geometric sizes of a self-excited pulsed jet such as the diameter of the suction and discharge nozzle, jet chamber length and diameter, and the collision angle are the main structural parameters. Under certain operating conditions at a given fluid flow rate, target space, and dynamic head, the jet strike force amplitude and frequency were significantly influenced by these structural sizes. Twenty five group orthogonal experiments were designed to explore the jet dynamic performance with structural sizes to find which group was the best combination. The experiment employed five levels of the diameter of the suction and discharge nozzles, three levels of the chamber diameter, and five levels of the length of the chamber and collision angles. Experimental results showed that the suction nozzle diameter was the most important parameter influencing the jet performance. The next was discharge nozzle diameter. The other three sizes of chamber diameter and length, and collision angle had the similar effect on the self-excited pulsed jet. The results can have guiding significance for the design of self-excited pulsed cavitation nozzles.