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Theoretical model and experiment on fluidic sprinkler wet radius under multi-factor |
LI Yangfan, LIU Junping*, LI Tao, XU Jien |
National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract In order to thoroughly study the theoretical formula of the complete fluidic sprinkler under multi-factor conditions, the complete fluidic sprinkler wet radius model was predicted. The experimental program of the complete fluidic sprinkler that was used to measure working pressure, installation height, nozzle size, nozzle elevation was designed by the combination method, and the variation law of the complete fluidic sprinkler wet radius under the multi-factor conditions was summed. The 1stOpt software was used to analyze the data to get the calculation formula of the complete fluidic sprinkler wet radius, and the formula was compared with the formula of two commonly-used sprinkler wet radius. The results show that with the change of the working pressure, the sprinkler wet radius changes greatly, and with the increase of the nozzle elevation, the curve of the sprinkler wet radius has a parabolic shape that first increases and then decreases. The installation height has little effect on the sprinkler wet radius, and the larger the nozzle size, the larger the sprinkler wet radius. The relationship between the wet radius of the complete fluidic sprinkler and the single factor is well fitted to the model established in this paper, and it shows a relationship of a power function. The difference between the theoretical formula wet radius and the experimental wet radius is less than 8%, which can provide a theoretical basis for the prediction of the complete fluidic sprinkler wet radius.
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Received: 28 March 2018
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