Atomization and Sprays Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

For Online Access

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2006, Volume16

Issue 2

115 pages

DOI: 10.1615/AtomizSpr.v16.i2

Issue price - $80.00

M. R. Halder
Department of Mechanical Engineering, Khulna University of Engineering & Technology, Bangladesh

S. K. Som
Department of Mechanical Engineering, I. I. T. Kharagpur, India

The pressure swirl atomizer is widely used in liquid fuel combustion devices in the aerospace and power generation industries. The experimental and numerical predictions of air core diameter d_a, the coefficient of discharge C_d, and the spray cone angle ψ of a cylindrical swirl-spray pressure atomizer have been made in the present study. The standard k-ε model of turbulence is used for numerical computation of flow within the nozzle. The diameter of the stable central air core inside the nozzle has been predicted at given operating conditions. The values of C_d and ψ have been evaluated from the radial distribution of velocity components of liquid flow at the nozzle exit plane. It has been observed from numerical and experimental investigations that the coefficient of discharge C_d decreases, while the air core diameter da and the spray cone angle ψ increase with the increase in nozzle flow in its lower range. However, all these parameters, C_d, ψ, and d_a, finally become independent of nozzle flow. Both d_a/D and ψ increase but C_d decreases with a decrease in Dp/D for the nozzles of constant L/D, where D_p, D, and L are the entry port diameter, swirl chamber diameter, and length of atomizer, respectively. Also, both d_a/D and ψ decrease, while C_d increases with an increase in L/D for the nozzles of constant D_p/D.

DOI: 10.1615/AtomizSpr.v16.i2.50 Download article, 223-236 pages

Article price - $35.00

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