Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2012.2511.2518Al-KayiemHussain H. HonTan Fok 1220121224The bulky size of gas turbine has always become a great factor
and limit in designing oil and gas offshore platforms. This study presents simulations
results on the effect of energy promoters in an aggressive intermediate gas
turbine diffuser. A typical S-shaped diffuser is modeled and simulated to become
in FLUENT 6.3.26 assuming 2-D and incompressible flow. The promoters were selected
with triangular shape of 25° frontal edge. The effect of energy promoters
was investigated with various configurations to obtain the best height and position.
The simulation was carried out with five different heights of 0.5, 1.0, 1.5,
2.0 and 2.5 mm and five different promoter locations in the upstream part of
the diffuser. The exit static pressure recovery, which ultimately affects the
diffusers efficiency, was adopted
as an indication for the diffuser performance. The simulation results show that
the energy promoters works as intended but still far from reaching the benchmark
efficiency of a normal/ideal diffuser. Among 5, 10, 15, 20 and 25° of location
angles in the inlet bend, the 10° location was found to be the most effective
location. The promoters with 2.0 mm height display the highest exit pressure
recovery. Further simulation will be required in three dimensional, as well
as experimental investigations to explore furthermore on the promoters contribution
in enhancing the diffusers efficiency.]]>Mehta, R.D. and P. Bradshaw,197983443449Zulkefli, N.F. and K.A. Ahmad,20102010Sieker, O. and J.R. Seume,20072007Fukudome, K., M. Watanabe, A. Iida and A. Mizuno,20052005Lord, W.K., D.G. MacMartin and T.G. Tillman,20002000Lin, J.C.,200238389420Graziosi, P. and K.R. Kirtley,20062006Widenhoefer, J.F., P. Graziosi and K.R. Kirtley,20092009Santer, C., E. Gottlich, A. Marn, J. Hubinka and B. Paradiso,20102010Gopaliya, M.K., P. Goel, S. Parshar and A. Dutt,201140280290Wallin, F. and L.E. Erriksson,20062006Wallin, F. and L.E. Eriksson,20082008