Study of Spiral Flow Generated through a Coanda Nozzle

摘要

The numerical investigation is carried out to clarify the effect of stagnation pressure in the reservoirupstream of the annular slit on characteristics of the axial and tangential velocity components in thespiral flow, and the mechanism of occurrence of spiral nozzle flow is clarified. In simulations, UPACSis used, and the results obtained are compared with velocity distributions measured by thetwo-component laser doppler velocimeter system.