ANALYSIS OF FLOW ON ANNULAR CURVED DIFFUSER BY USING CFD

Sangappa Hadapad, Basavaraj Dotihal

Abstract: The integral component of the gas turbine engines are curved annular diffusers at high speed air craft. By reducing the total pressure loss the diffuser facilitate effective operation of the combustor. The performance of these diffusers depends on their geometry and inlet conditions. In the present investigation the distribution of static pressure and total pressure are studied with the help of CFD on a curved annular diffuser of 300 ,350 and 400 angle of turn and also by varying the circular hub of diameter to5mm, 7.5mm, 10mm, 12.5mm,15mm and 20mm and allowing the air as fluid to pass through the diffuser. ANSYS FLUENT 14.5 is used for this assessment and Turbulence model as standard k- e also used. In this investigation it was observed that for a small angle of turn the static pressure recovery is more and as the angle of turn increases static pressure recovery reduces and also the total pressure loss is more. And it was also observed that for an angle of 300 with 20mm hollow diameter the static pressure is better and total pressure is less.

Keywords: Annular Curved Diffuser, CFD, Ansys Fluent

DOI: https://doi.org/10.15623/ijret.2017.0602016