SD-03型地埋式喷头水力性能试验研究

为了研究不同压力下喷头水力性能,明确工作压力对其他参数的影响,文中对一种喷嘴出口直径为5 mm型号为SD-03的地埋式喷头进行了研究.测量出喷头在200,250,300和350 kPa工作压力下的流量、转速及径向水量分布,并计算出不同压力下的射程.结果表明:流量、射程、转速以及喷灌强度都随着喷头工作压力的增大而增大.此外,在射程计算的经验公式基础上进行了修正,得到了不同压力下,射程公式的修正系数为0.5~0.6;转速随着压力增大而增大,得到了喷头压力和喷头转速的关系多项式;分析喷灌强度的分布曲线,相比于200 kPa下的最高喷灌强度,当压力增大时最高喷灌强度同比增长15.93%~18.67%,为地埋式喷头的后续研究提供了科学的理论依据以及在工程应用中提供了理论基础.

Experiment on hydraulic performance of type SD-03 pop-up sprinkler

In order to study the hydraulic performance of a sprinkler under different pressures and clarify the effect of working pressure on other parameters, a type SD-03 pop-up sprinkler with the diameter of 5 mm was investigated experimentally in this paper. The flow, rotational speed, and radial water distribution of the sprinkler were measured under 200, 250, 300 and 350 kPa working pressures, but also its ranges under these pressures were calculated. The results show that the flow rate, range, rotational speed and spray irrigation intensity rise with increasing working pressure and exhibit a good regularity. An empirical formula for spray range is revised, and the corresponding correction coefficient for the formula is identified to be 0.5-0.6 under different pressures. A polynomial relationship between pressure and rotational speed is obtained and the distribution curve of sprinkler irrigation intensity is analyzed. Compared with the highest irrigation intensity at 200 kPa pressure, the highest irrigation intensity increases by 15.93%-18.67% when the pressure rises. It provides a scientific theoretical basis for the follow-up study of the buried sprinkler.