THE EFFECT OF SWIRL NUMBER ON DISCHARGE COEFFICIENT FOR VARIOUS ORIFICE SIZES IN A BURNER SYSTEM
Keywords:
Swirler, orifice plate, pressure drop, swirl number, discharge coefficientAbstract
A liquid fuel burner system with different orifice plate sizes mounted at the exit plane of the air
swirler outlet has been investigated using a 140 mm inside diameter combustor of 400 mm length. Three different orifice plate diameters of 45 mm, 40 mm and 35 mm were used with a 10Ëš to 70Ëš radial air swirler vane angles. The purpose of orifice plate insertion is to create the swirler pressure loss at the swirler outlet so that the swirler outlet shear layer turbulence could be maximized to assist in the mixing of fuel and air. Measurements of air flow rates, air inlet temperature, air inlet pressure and pressure drop across the combustor have been carried out to predict the isothermal characteristics inside the combustor, ie. discharge coefficient. The result shows that the discharge coefficient decreases as the swirl number increases for all three different orifice plate sizes.
References
Khezzar, L., 1998, Velocity Measurement in the Near Field of a Radial Swider, Experimental Thermal and Fluid Science, Vol 16, pp 230-236, Elsevier Science Inc.
Gupta, AK., Lilley, D.G. and Syred, N., 1984, Swirl Flow, Abacus Press, Great Britain.
Mohd. Nazri, M.J., 2000, Proceeding of 6th Apiscue, Universiti Teknologi Malaysia, pp.483-488.
Beer, J.M. and Chigier, N.A., 1972, Combustion Aerodynamics, Applied Science Publishers Ltd.
Lefebvre, AH., 1983, Gas Turbine Combustion, Hemisphere Publishing Corporation.
Syred, N. and Beer, M., 1974, Combustion in Swirling Flow: A Review, Combustion and Flame, 23:143-201.
Al-Kabie, H.S., 1989, Radial Swirler for Low Emissions Gas Turbine Combustion, PhD. Thesis, Univ. of Leeds.
Claypole, T.e. and Syred, N., 1981, The Effect of Swirl Burner Aerodynamic on NOx Formation, 18h Symposium on Combustion. The Combustion Institute.
Downloads
Published
How to Cite
Issue
Section
License
Copyright of articles that appear in Jurnal Mekanikal belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions or any other reproductions of similar nature.
