动态水压下非旋转式折射喷头水力特性
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“十二五”国家科技支撑计划资助项目(2011BAD29B00)和高等学校学科创新引智计划(111计划)资助项目


Hydraulic Performance of Fixed Spray Plate Sprinkler under Dynamic Water Pressure
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    摘要:

    为解决非旋转式折射喷头水量分布集中,打击动能较大的问题,构建了动态水压喷灌测试平台。选择Nelson D3000型喷头为研究对象,施加以三角函数型动态变化的水压,对喷头的径向水量分布与能量分布进行测试,并与恒压条件下的水量和能量分布进行对比。结果表明:构建的动态水压测试平台能够满足对动态供水压力的要求,施加了动态水压的Nelson D3000型喷头径向湿润范围由恒压时的0.85~1.36m增加到2.55~4.42m,喷灌强度最大值降低67.6%~78.4%,能量通量密度最大值降低52.9%~71.6%,说明采用动态水压供水可以有效地改善Nelson D3000型喷头的径向水量分布和能量分布。

    Abstract:

    In order to improve the sprinkler application rate and kinetic energy distribution of fixed spray plate sprinkler, a dynamic water pressure based sprinkler test platform was built. A Nelson D3000 nozzle was selected and then the water application rate and kinetic energy distribution in radial direction were tested under both dynamic water pressure in trigonometric type and constant pressure. The results showed that the test platform could well meet the demands of dynamic water pressure. The wetness area of Nelson D3000 nozzle in radial direction increased from 0.85~1.36m to 2.55~4.42m. The maximum value of sprinkler application rate was reduced by 67.6%~78.4%, and the maximum value of energy density flux was reduced by 52.9%~71.6%. Both the sprinkler application rate and kinetic energy distribution of Nelson D3000 nozzle were effectively improved.

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葛茂生,吴普特,朱德兰,张林,巩兴晖.动态水压下非旋转式折射喷头水力特性[J].农业机械学报,2015,46(2):27-33.

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  • 收稿日期:2014-01-11
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  • 在线发布日期: 2015-02-10
  • 出版日期: 2015-02-10