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今年四月,我国第一座喷灌水力学试验厅在水利部和中国农业科学院新乡农田灌溉研究所内建成投入使用。该厅除承担本所试验任务外,对外开放接受委托试验,也欢迎有关研究单位来此联合或单独进行试验。 该厅四月首次接受河南省水工机械厂及新郑县农机厂的委托,对所生产的水龙—2型喷头和PY_1S—50型喷头进行水力性能试验。试验过程迅速、数据准确、效果良好。 长期以来,因为条件限制,我国的喷头水力性能试验都是在露天进行。由于室外气流变动很大,使喷射水流的边界条件处于不稳定状态,试验测量的准确度很难提高。即使增加测点数目也很难得到满意的结果,而且会大大增加测量工作量。更由于在做喷头
In April this year, China’s first Sprinkler Hydraulic Laboratory was set up and put into use in the Ministry of Water Resources and the Xinxiang Farmland Irrigation Research Institute of the Chinese Academy of Agricultural Sciences. In addition to the Office of the laboratory to assume the task of testing, opening up to accept the commissioned test, but also to welcome the relevant research units to conduct a joint or separate test. The hall for the first time in April to accept the Henan Hydraulic Machinery Factory and Xinzheng County Agricultural Machinery Commission commissioned by the production of the Dragon-2 nozzle and PY_1S-50-type nozzle for hydraulic performance test. Test process is rapid, accurate data, the effect is good. For a long time, because of the conditions, our hydraulic performance test nozzle are carried out in the open air. Due to the large fluctuation of outdoor air flow, the boundary conditions of jet flow are not stable, and the accuracy of experimental measurement is hard to be improved. Even increasing the number of measurement points is difficult to obtain satisfactory results, and will greatly increase the measurement workload. More because of the nozzle