Characteristics of asymmetric coaxial jets
An experimental has been carried for coaxial jets, in which an annular jet surrounds a central jet, arise in numerous combustion and propulsion applications due to their vigorous mixing characteristics. The mixing is dominated by the vortex rings whose interactions govern the growth, entrainment, and mixing of the jet. Dynamic mixing can be obtained through asymmetric nozzle geometries. The objective of this research was to design, construct and to investigate the characteristics of a turbulent elliptical coaxial jet with 0.45, 0.63 and .81 velocity ratios (m = Uo/U i). In order to design elliptic coaxial flow nozzles, CAD (Computer Aided Drawing) models of two-dimensional fifth degree order polynomial equation were plotted and subsequently three dimensional drawings were created. ^ The coaxial nozzles were restricted to an inlet radius of 9.649 cm (3.799 inches) and an exit area of 17.129 cm2 (2.655 in2), with the elliptical nozzle having 2:1 aspect ratio. ^ The final step included the study of the near-field flow characteristics of circular square and hexagonal micro coaxial jets at different velocity ratios. (Abstract shortened by UMI.)^
Jasso Sevilla, Fernando Javier, "Characteristics of asymmetric coaxial jets" (2003). ETD Collection for University of Texas, El Paso. AAIEP10565.