多因素下全射流喷头射程计算模型及试验

为了深入研究多因素条件下全射流喷头射程公式,预测全射流喷头射程模型.采用组合法对全射流喷头射程进行试验设计,包括测量喷嘴直径、喷头仰角、工作压力、安装高度等因素,总结全射流喷头射程在不同因素下的变化规律,利用1stOpt软件进行数据分析得到全射流喷头射程计算公式,并利用此公式与当前常用的2个喷头射程公式进行对比分析.结果表明:随着工作压力的变化射程出现较大的变化,喷头射程随喷头仰角的增大呈先增大后减小的抛物线型变化,喷头安装高度对射程的影响较小,喷嘴直径越大喷头射程越大.全射流喷头射程与单个因素之间的关系与所建立的模型拟合较好,呈幂函数关系,计算射程与试验射程相差小于8%,研究结果可为全射流喷头射程的预测提供理论依据.

Theoretical model and experiment on fluidic sprinkler wet radius under multi-factor

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.