異形噴嘴對變量噴頭水力性能的影響

doi:10.3969/j.issn.1000-1298.[year].[issue].[sequence]

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異形噴嘴對變量噴頭水力性能的影響
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                        10.3969/j.issn.1000-1298.[year].12.[sequence]
                    
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基金項目:國家高技術研究發(fā)展計劃（863計劃）資助項目（2011AA100506）

Effect of Non-circle Nozzle on Hydraulic Performance of Impact Variable-rate Sprinkler

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研究了異形噴嘴對變量噴頭水量分布的影響。依據(jù)面積相同原則設計多種形狀的異形噴嘴，測量了異形噴嘴的流量系數(shù)、射程和末端水滴直徑，得出星形噴嘴射程降低較少，不同壓力時水量分布規(guī)律相近，可改善低壓力下均勻度。對比了星形噴嘴變量噴頭和圓形噴嘴變量噴頭的水力性能，星形噴嘴變量噴頭遠射程處平均噴灌強度為近射程處的85%，圓形噴嘴變量噴頭遠射程處平均噴灌強度為近射程處的79%，星形噴嘴變量噴頭水量分布優(yōu)于圓形噴嘴變量噴頭。分析比較了變量噴頭水量分布等值線圖，結(jié)果表明，星形噴嘴變量噴頭的水量分布均勻度好于圓形噴嘴變量噴頭，方形噴灑域的均勻度好于三角形噴灑域。

Abstract:

To improve the irrigation uniformity of the variable-rate sprinkler, the relationship between the non-circle nozzle and the rainfall distribution of the variablerate sprinkler was studied. Based on equal nozzle area, non-circle nozzles with different shapes were designed and their hydraulic characteristics were compared through experiment. The experiment indicated that for the star shaped nozzle, the range rarely decreased and the tendency of the rainfall distribution under different pressures were similar. The hydraulic character was compared between the star shaped nozzle and the circle nozzle. For the star shaped nozzle, the rainfall distribution of the long range area was 85% of the short range area, for the circle nozzle, the number was 79%, which indicated that the rainfall distribution of the star shaped nozzle was better than that of the circle nozzle. The isogram of sprinkler water depth showed that the irrigation uniformity of the star shaped nozzle was better than that of the circle nozzle and the irrigation uniformity of the square irrigation area was better than that of the triangle irrigation area.

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陳超,袁壽其,李紅,王超.異形噴嘴對變量噴頭水力性能的影響[J].農(nóng)業(yè)機械學報,2011,42(12):111-115. Chen Chao, Yuan Shouqi, Li Hong, Wang Chao. Effect of Non-circle Nozzle on Hydraulic Performance of Impact Variable-rate Sprinkler[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(12):111-115.

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在線發(fā)布日期: 2011-12-19
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