Author
Abstract
Analysis of flow through the conical diffuser of an annular combustion system
is presented. The flow is assumed to be unsteady, quasi three dimensional,
compressible and turbulent. A k-ε model was used to simulate turbulence.
Several area ratios and divergence angles were tested until circulation took
place. At this angle a snout was introduced to correct the flow. A control volume
method was used to solve the differential equations of the flow to obtain velocity
and pressure coefficient distributions. The numerical results show that the axial
velocity decreases with diffuser length for a certain divergence angle. But it
increases with angle of divergence for the same area ratio, while the radial
component of velocity was found to increase with both. It was proved that the
snout can correct the flow whenever circulation takes place.
Keywords
)
