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Show 8 7.B 6.B S.B 4.B 3.0 2.0 1.0 0 X XX o • X K o *x X o • ST xx nM m o9 «*> » •-1'. G^' X N::ZLE • • • S1RRI6HT 2 = 10 cr, i . _ O CORL-o NSZZLE • o TCP o 4 o X SLURRY RRD'.R. POSH r--e CT r«1.2S cit r = 2.S c» > io: 0 0.2 B.4 0.6 0.B 1.0 Figure 5: Data Validity Measure. air volume flow rates and three slurry/water volume flow rates. Water was used as a medium to be atomized to identify the influence of viscosity and to determine if an analogy could be drawn between slurry and water atomization. The measurements were restricted to one axial cross-section at z = 10 cm, and 3-4 radial locations including the spray centerline. It was assumed that the difference between the two spray nozzles and media would be consistent in the whole spray fuel. therefore a complete mapping of the spray field was not conducted. A total of 192 particle size measurements were performed and the reproducibility of the measurements were controlled by repeating the complete scries. The experiments were reproducible with an acceptable error bound of 3.5 percent on the average. The reproducibility of the data reduced towards the end of the experiments since erosion had altered the spray nozzles. An overview of the experiments is given in the test matrix (Table 1). RESULTS, D A T A INTERPRETATIONS, A N D C O N C L U S I O NS The experimental data are presented in Figures 6-17. The measured S M D is plotted for four atomization air flows and one slurry volume flow per figure. The solid curves represent best fits of an exponential function to determine the empirical formula for the S M D as a function of air-volume flow, slurry volume flow and nozzle geometry and radial location: 7 |
