Spread Characteristics of Supersonic Noncircular Jets

Various research studies on jet spread characteristics have been conducted on the non-circular supersonic jets. However, in these studies, the hydraulic diameter & shape factor of nozzle exit geometry has not been emphasized. The scope of the current investigation includes jet spreading behavior, jet half-width, and axis switching phenomena. This investigation used various types of a nozzle like square, hexagon, elliptical, triangular, circular, and rectangular with divergent and convergent length and throat area ratios are the same. The results ascertained that the hydraulic diameter should be smaller for faster jet mixing. The principal, minor, and diagonal characteristics dimension of hydraulic diameter plays a significant role in spread characteristics. The mixing contribution is lower in circular jets compared to rectangular jets. The distance between the ambient lip and nozzle exit lip plays a vital role at the nozzle exit for mass entertainment.