مرکز منطقه ای اطلاع رساني علوم و فناوري - Evaluation of technical specification of mini sprinklers and derivation of mathematicalmodel for flow rates prediction

Abstract :

In this study, it is aimed to compose mathematical model that can be used in predicting flow rate values,pressure-flow rate relationships and making difference within different operating conditions todemonstrate technical characteristics of local made and imported strange made mini sprinkler irrigation nozzles that has been used in our country. For this reason, different nozzle diameters are widely used inour country by providing mini sprinkler irrigation nozzles in 4 different nozzle types (A, B, C and D) indifferent nozzle diameters of total of 21 varied nozzle in this study were discussed. Used in this study foreach nozzle, flow rates of 20 mini sprinklers that have the same nozzle diameter prepared with the help ofa trial method up to 1.0-1.5-2.0-2.5 and 3.0 pressure levels were measured five different pressure values.In this study for all sprinklers, the difference is found between 0.0102-0.0693 and the lowest value of these manufacturing variations (Vm) are type B and C. Produced with the same technology of the sametype may have seen to be different flow rates of the two mini-sprinkler nozzles under constant pressure. All mini sprinkler nozzles for different nozzle diameters in deference to operating pressures a modelequation which can predict the flow were introduced. For mini sprinkler nozzles of A, B, C and D types that developed model equalities with flow rate values, respectively, 99.60%, 99.94%, 96.65% and 99.83%can be used to prediction. In last period of this study, including all nozzle types have been revealed model equality. This model equality included all the mini sprinkler irrigation nozzles, nozzle diameter 1.3 and2.59 mm and working pressure 1.0-3.0 bar to limits, flow rate values can be predicted 98.50%.