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Abstract


Effect of the CoreDiscs Used in Hollow Cone Nozzleson Spray Angle and Spray Pattern
In this study, the effects of different cores used with hollow cone nozzles on its spray pattern angle and spray pattern distribution were investigated. One of the cores was made of stainless steel, and the others were made of polyacetal (POM) in blue, green, yellow and pink colors. The nozzle spray pattern anglesat 3 bar, 6 bar and 9 bar spray pressures were determined in the range of 35.1° to 60.9°. The highest nozzle spray pattern angles were obtained with blue (53.8° for 6 bar; 59.3°for 9 bar) and green (54.6° for 6 bar; 60.9° for 9 bar) cores. When the spray height was 20 cm, 40 cm and 60 cm, the spray cover ages were varied within the wide limits, from 12.7 to 70.6 cm. In appearance, while the spray pattern of the pink and green cores were similar to the hollow calycate form, and the others appeared similar to the trapeze form. The variation coefficient (CV %) of the single nozzle spray pattern decreased as the spray pressure increased. Without overlapping, while the lowest CV % was obtained with the pink core, and the highest CV% were found in the stainless steel and blue cores. When the cone nozzles with Ø 1.0 mm orifice diameter were assumed to be mounted in the spacing ranges of 25 cm, 30 cm, 35 cm, 40 cm, 45 cm and 50 cm with adjacent to each other the volumetric distribution homogeneity (CV %)calculated with the overlapping of the adjacent nozzles were found over the 10 % for the constant spray height of 60 cm. With increasing the spray pressure, the skewness and kurtosis of the spray pattern were significantly decreased. The lowest skewness was obtained from the pink and green cores. At the low spray pressure, the spray pattern formed steeper than normal distribution and the kurtosis of spray pattern decreased as the spray pressure increased.

Keywords
Nozzle core, operational pressure, patternator, spray nozzle, skewness


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