流道结构对非旋转折射式喷头水力性能影响的试验研究
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摘要
以非旋转折射式喷头为研究对象,设计散水盘的流道长度、流道个数和流道出口形状,通过正交试验测试了单喷头水量分布,采用线性插值法计算射程,通过直接叠加法得到组合水量分布,计算了2.5m喷头间距下的组合均匀性系数,并运用极差分析法研究了流道结构参数对喷头水力性能的影响。结果表明:不同流道长度、流道个数和流道出口形状非旋转折射式喷头的单喷头水量分布呈波浪形上下浮动,但波动的幅度有差异。流道结构参数对射程影响的主次顺序为流道长度、流道个数、流道出口形状,对喷灌强度峰值影响的主次顺序为流道个数、流道长度、流道出口形状,对组合喷洒均匀性系数影响的主次顺序为流道个数、流道长度、流道出口形状。
In this study,a fixed spray plate sprinkler is taken as the study project and the flow channel length,flow channel number and flow channel shape of the deflection plate are designed.The orthogonal test on the water distribution of single sprinkler is conducted.The wetted radius is calculated by the linear interpolation method.The combination water distribution is obtained by using direct superposition method and the combination uniformity coefficient at 2.5mcombination distance is calculated.The range analysis method is used to study the influence of flow channel structure parameter on hydraulic performance of fixed spray plate sprinkler.The results indicated that the water distribution of single sprinkler with different flow channel length,flow channel number and flow channel shape fluctuates like wave shapes,but the fluctuation amplitude is different.The influencing factors of wetted radius are flow channel length,flow channel number and flow channel shape in sequence.The influencing factors of maximum precipitation rate are flow channel number,flow channel length and flow channel shape in sequence.The influencing factors of combination uniformity coefficient are flow channel number,flow channel length and flow channel shape in sequence.
In this study,a fixed spray plate sprinkler is taken as the study project and the flow channel length,flow channel number and flow channel shape of the deflection plate are designed.The orthogonal test on the water distribution of single sprinkler is conducted.The wetted radius is calculated by the linear interpolation method.The combination water distribution is obtained by using direct superposition method and the combination uniformity coefficient at 2.5mcombination distance is calculated.The range analysis method is used to study the influence of flow channel structure parameter on hydraulic performance of fixed spray plate sprinkler.The results indicated that the water distribution of single sprinkler with different flow channel length,flow channel number and flow channel shape fluctuates like wave shapes,but the fluctuation amplitude is different.The influencing factors of wetted radius are flow channel length,flow channel number and flow channel shape in sequence.The influencing factors of maximum precipitation rate are flow channel number,flow channel length and flow channel shape in sequence.The influencing factors of combination uniformity coefficient are flow channel number,flow channel length and flow channel shape in sequence.
引文
[1]Yan H J,Bai G,He J Q,et al.Influence of droplet kinetic energy flux density from fixed spray-plate sprinklers on soil infiltration,runoff and sediment yield[J].Biosystems Engineering,2011,110(2):213-221.
[2]蔡振华.中心支轴式喷灌机关键灌水组件开发及试验研究[D].北京:中国农业机械化科学研究院,2009.
[3]Faci J M,Salvador R,Playán E,et al.Comparison of fixed and rotating spray plate sprinklers[J].Journal of Irrigation and Drainage Engineering,2001,127(4):224-233.
[4]Yan H J,Jin H Z,Qian Y C.Characterizing center pivot irrigation with fixed spray plate sprinklers[J].Science China Technological Sciences,2010,53(5):1 398-1 405.
[5]Sánchez Burillo G,Delirhasannia R,Playán E,et al.Initial drop velocity in a fixed spray plate sprinkler[J].Journal of Irrigation and Drainage Engineering,2013,139(7):521-531.
[6]巩兴晖,朱德兰,张林,等.基于2DVD的非旋转折射式喷头水滴直径分布规律[J].农业机械学报,2014,45(8):128-133.
[7]柴春岭,杨路华,脱云飞,等.可调式微喷头出水口流道形式对喷洒水性能影响的试验研究[J].农业工程学报,2005,21(3):17-20.
[8]Christiansen J E.Irrigation by sprinkling[California Agricultural Experiment Station Bull.No.670][R].Davis:California University,1942.
[9]GB/T50085-2007,喷灌工程技术规范[S].
[2]蔡振华.中心支轴式喷灌机关键灌水组件开发及试验研究[D].北京:中国农业机械化科学研究院,2009.
[3]Faci J M,Salvador R,Playán E,et al.Comparison of fixed and rotating spray plate sprinklers[J].Journal of Irrigation and Drainage Engineering,2001,127(4):224-233.
[4]Yan H J,Jin H Z,Qian Y C.Characterizing center pivot irrigation with fixed spray plate sprinklers[J].Science China Technological Sciences,2010,53(5):1 398-1 405.
[5]Sánchez Burillo G,Delirhasannia R,Playán E,et al.Initial drop velocity in a fixed spray plate sprinkler[J].Journal of Irrigation and Drainage Engineering,2013,139(7):521-531.
[6]巩兴晖,朱德兰,张林,等.基于2DVD的非旋转折射式喷头水滴直径分布规律[J].农业机械学报,2014,45(8):128-133.
[7]柴春岭,杨路华,脱云飞,等.可调式微喷头出水口流道形式对喷洒水性能影响的试验研究[J].农业工程学报,2005,21(3):17-20.
[8]Christiansen J E.Irrigation by sprinkling[California Agricultural Experiment Station Bull.No.670][R].Davis:California University,1942.
[9]GB/T50085-2007,喷灌工程技术规范[S].