engleski

The effect of height to the nozzle on the surface field distribution of liquid

The paper presents research results of surface and volume distribution of water, their flow and working at heights for two agricultural sprayer nozzles. Research was conducted at 11004 marks nozzles made of brass, from the company "Andric" and "Mlaz". The nozzles "Andric" achieved an average value of the flow test at 2 bar pressure from a value of 0.815 lmin-1, the standard deviation from 0.0602 and coefficient of variation 7.38%. In addition, the company nozzles "Mlaz" at the same pressure achieved an average value of the flow 1.30 lmin-1 achieved standard deviation of 0.0155 and coefficient of variation of only 1.19%. The working pressure 3 bar nozzles by company "Andric" produced a flow of only 1.00 lmin-¹ nozzles and the company "Mlaz" 1.583 lmin-1, which is expected because the indicated op ISO 10625.Therefore, ''Andrić'' nozzles marked 11004 is wrongly marked because the flow values correspond to tag 110025 The nozzles, "Andric" at working pressure of two bars and a working height of 40cm achieved an average width of 96.25 cm from the spray and the working height of 60 cm achieved an average width of 128.43 cm spray. At working pressure of three bars and a working height of 40cm, width of the spray was 94.06 cm, while the average width of the spray working height of 60 cm was 135.31 cm. The nozzles type "Mlaz" at working pressure of two bars and a working height of 40 cm achieved an average width of 131.25 cm from the spray and the working height of 60 cm and the same working pressure have an average width of the crossover from 176.56 cm. At working pressure of three bars and a working height of 40 cm, width spray was 134.37 cm, while the average width of the spray working height of 60 cm was 174.68 cm. The nozzles "Mlaz" achieved, after the triple covering of the average values, distribution of liquid in the working pressure of 2 bar and a working height of 40 cm, the width of the strip of 50 cm from 67.52 ml with a coefficient of variation of 29.63%, while the same working pressure and a working height of 60 cm measured was 65.33 ml with the coefficient of variation of 27.62%. At working pressure of 3 bar and a working height of 40 cm was measured amount of water from 85.15 ml with coefficient of variation of 18.39%, and at a height of 60 cm measured was 78.24 ml with a coefficient of variation of 28.76 %. The nozzle at the company, "Andric" after the triple covering the average values of the width of the strip of 50 cm, the working pressure of 2 bar and a working height of 40 cm, measured the amount of water from 41.38 ml with coefficient of variation of 21.18%, while at the same pressure and the working height of 60 cm measured was 40.48 ml with a coefficient of variation of 19.52%. At working pressure of 3 bar and a working height of 40 cm was measured amount of water from 50.12 ml with coefficient of variation of 19.42%, and at a height of 60 cm measured was 49.68 ml with a coefficient of variation of 11.96 %.

nozzle ; the coefficient of variation ; a triple overlap ; working width

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