Numerical Investigation into the Effects of Design Parameters on the Flow Characteristics in a Turbine Exhaust Diffuser

In this study, we numerically investigated the effects of design parameters, such as strut geometry or diffusion angle, on performance an industrial turbine exhaust diffuser. Turbine diffusers are commonly used to change kinetic energy gases from outlet stages into static pressure. The diffuser in work consisted annular with five identical struts equally spaced around front circumference and a conical hub extension at rear. Four parameters were considered several values for each parameter tested study. aerodynamic performances studied evaluated according their pressure recovery coefficients rates total loss. Contours velocity, pressure, entropy increase plotted compared various shapes. numerical results showed that thickness axially swept angle significantly influence diffuser, whereas lean hade less important.