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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1995, Volume5

Issue 4&5

166 pages

Issue price - $150.00

Kenneth D. Kihm
Texas A&M University College Station, TX; and Micro/Nano-Scale Fluidics and Energy Transport Laboratory, University of Tennessee, Mechanical, Aerospace and Biomedical Engineering Department, Knoxville TN 37996-2210, USA

G. M. Lyn
Department of Mechanical Engineering, Texas A&M University, College Station, Texas

S. Y. Son
Department of Mechanical Engineering, Texas A&M University, College Station, Texas

Experimental investigations have been made for cross-injecting sprays into a convective air stream as a primary means of fuel atomization. A laser diffraction particle-analyzing technique (the Malvern system) is used assuming a Rosin-Rammler two-parameter model for the drop size distribution function. The study's varied injection parameters include the convective air flow rate, the flow rate of the injected liquid (distilled water), the orifice diameter, and measurement locations along the two-dimensional spray plane. Buckingham-PI analysis finds the correlation of dimensionless parameters. A correlation of drop Sauter mean diameter (SMD) normalized to the orifice diameter is obtained from all the experimental data as
SMD/D_o = 1.015 × 10¹⁹ Re_g^−3.5998Re_f^−1.8094We^2.2474(x/D_o)^−0.6867(y/D_o)^1.9718
where D_o is the injector orifice diameter that constitutes the length scale of Re_f and of We. The air Reynolds number, Re_g, is defined based on the channel hydraulic diameter. A statistical analysis of the correlation equation shows a 97.5% confidence interval and a coefficient of multiple determination, R², of 0.94.

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