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

ISSN for PRINT: 1045-5110

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1991, Volume1

Issue 1

144 pages

Issue price - $75.00

S. Kevin Chen
Thermal Sciences and Propulsion Center, School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, USA

Arthur H. Lefebvre
Emeritus Professor, Cranfield University, Stratford, U.K., and Purdue University, W. Lafayette, IN, USA

J. Rollbuhler
NASA-Lewis Research Center, Cleveland, Ohio

Measurements of mean drop size and drop size distribution are carried out over wide ranges of liquid injection pressure, using seven different simplex swirl nozzles to achieve a wide variation in the length/diameter ratio of the final discharge orifice. Mixtures of water and glycerine-water an used to provide a 12-to-1 variation in liquid viscosity. For liquids of low viscosity the mean drop size diminishes with increase in discharge orifice diameter. Reduction in the length/diameter ratio of the discharge orifice produces a finer spray, especially at low levels of liquid injection pressure. The influence of liquid viscosity on mean drop size diminishes with increase in injection pressure. Increase in liquid viscosity generally leads to a broader distribution of drop sizes in the spray, while increase in discharge orifice length/diameter ratio produces a more uniform drop size distribution.

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