地埋式内镶贴片滴灌灌水器水力性能模拟研究
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摘要
【目的】探究地埋式内镶贴片滴灌灌水器的水力性能。【方法】对具有M型双肩过滤出口的地埋式内镶贴片滴灌灌水器进行了不同工作压力条件下的流量测试试验,并采用RNG k-ε湍流模型分别对平面简化流道、实际微弯流道、实际微弯流道+进口、实际微弯流道+M型双肩过滤出口以及实际微弯流道+上述进出口的5种情况进行了相应工作压力下的三维数值模拟。【结果】三维全流道数值模拟流量与实测流量相近,其最大误差为8.87%。无控制的出口结构,水流在出水孔中心处形成旋涡,采用M型双肩过滤机构的出口会在主流两侧产生2个旋流,出水孔中心处无旋涡。【结论】地埋式内镶贴片滴灌灌水器流道模型的微弯对贴片灌水器水力性能有一定的影响。滴灌灌水器采用M型双肩过滤机构的出口有利出流且提高了抗堵塞性能。
【Objective】This paper presents a numerical study on the hydraulic performance of subsurface inlay drip emitter.【Method】We used the RNG k-ε turbulence model and simulated detailed 3D fluid flow in the drip emitters under different working pressure conditions.【Result】The numerically simulated fluid flow in the channel was comparable to measurement, with errors less than 8.87%. The inlet grouting part of the drip irrigation emitter and the M-type shoulder filter outlet part have no significant effect on the flow rate of the drip irrigation emitter. Export without control structure, the water flow forms a vortex centered on the water outlet hole, which is not conducive to water outflow and is easy to block. The outlet of the M-type shoulder filter mechanism concentrates the water flow near the water outlet hole, which is favorable for water outflow and improves the anti-clogging performance.
【Objective】This paper presents a numerical study on the hydraulic performance of subsurface inlay drip emitter.【Method】We used the RNG k-ε turbulence model and simulated detailed 3D fluid flow in the drip emitters under different working pressure conditions.【Result】The numerically simulated fluid flow in the channel was comparable to measurement, with errors less than 8.87%. The inlet grouting part of the drip irrigation emitter and the M-type shoulder filter outlet part have no significant effect on the flow rate of the drip irrigation emitter. Export without control structure, the water flow forms a vortex centered on the water outlet hole, which is not conducive to water outflow and is easy to block. The outlet of the M-type shoulder filter mechanism concentrates the water flow near the water outlet hole, which is favorable for water outflow and improves the anti-clogging performance.
引文
[1]CAMP C R.Subsurface drip irrigation:a review[J].Transactions of the ASAE,1998,41(5):1 353-1 367.
[2]NAKAYAMA F S,BUCKS D A.Water quality in drip/trickle irrigation:A review[J].Irrigation Science,1991,12(4):187-192.
[3]HUANG S,DONG W,WEI Q,et al.Advanced Methods to Develop Drip Emitters with New Channel Types[J].Applied Engineering in Agriculture,2006,22(2):243-249.
[4]杨培岭,雷显龙.滴灌用灌水器的发展及研究[J].节水灌溉,2000(3):17-18.
[5]崔振华.弧形迷宫流道结构参数对水力性能影响[D].杨凌:西北农林科技大学,2009.
[6]SALVADOR P G,ARVIZA V J,BRALTS V F.Hydraulic Flow Behaviour through an in-line Emitter Labyrinth Using CFD Techniques[J].ASAE Paper,2004.
[7]颜廷熠.基于CFD模拟的迷宫滴头工作性能研究[D].北京:中国农业科学院研究生院,2008.
[8]NISHIMURA T,BIAN Y,MATSUMOTO Y,et al.Fluid flow and mass transfer characteristics in a sinusoidal wavy-walled tube at moderate Reynolds numbers for steady flow[J].Heat&Mass Transfer,2003,39(3):239-248.
[9]TATSUO N,SHINICHIRO M,SHINGHO A,et al.Flow observations and mass transfer characteristics in symmetrical wavy-walled channels at moderate Reynolds numbers for steady flow[J].International Journal of Heat&Mass Transfer,1990,33(5):835-845.
[10]ZHANG J,ZHAO W,TANG Y,et al.Numerical investigation of the clogging mechanism in labyrinth channel of the emitter[J].International Journal for Numerical Methods in Engineering,2010,70(13):1 598-1 612.
[11]谢巧丽,牛文全,李连忠.进口结构对迷宫流道滴头性能影响的模拟研究[J].西北农林科技大学学报(自然科学版),2015,43(1):206-212.
[12]OLIVER M M H,HEWA G A,PEZZANITI D.Bio-fouling of subsurface type drip emitters applying reclaimed water under medium soil thermal variation[J].Agricultural Water Management,2014,133(2):12-23.
[13]YAN Dazhuang,YANG Peiling,REN Shumei,et al.Numerical study on flow property in dentate path of drip emitters[J].New Zealand Journal of Agricultural Research,2007,50(5):705-712.
[14]聂磊.基于灌水器流量的湍流模型适应性研究[J].节水灌溉,2008(1):13-17.
[15]潘雅阁.齿形流道结构对滴头水力性能影响的试验研究[D].杨凌:西北农林科技大学,2017.
[16]张重,任树梅,杨培岭,等.圆柱型灌水器迷宫式流道内部流体流动的CFD模拟精度研究[J].中国农业大学学报,2016,21(9):149-155.
[17]WU D,LI Y K,LIU H S,et al.Simulation of the flow characteristics of a drip irrigation emitter with large eddy methods[J].Mathematical&Computer Modelling,2013,58(3/4):497-506.
[18]徐毅,赵钢,王茂枚,等.基于数值模拟的现浇混凝土暗管断面形式研究[J].灌溉排水学报,2018,37(10):94-99.
[19]王延召,张耀哲.渠系节点悬移质淤积分布数值模拟[J].灌溉排水学报,2018,37(5):81-85.
[20]任荣,马娟娟,郑利剑,等.蓄水坑灌水土温度变化对土壤水分再分布规律的影响[J].灌溉排水学报,2018,37(4):39-46.
[21]聂卫波,董书鑫,马孝义.基于灌区尺度的畦田规格优化研究:以泾惠渠灌区为例[J].灌溉排水学报,2018,37(4):113-120.
[22]郭龙.外啮合齿轮泵内部流场瞬态数值模拟研究[D].兰州:兰州理工大学,2017.
[23]刘玉春,吴现兵,刘宏权,等.内镶式滴灌带水力性能试验研究[J].河北农业大学学报,2011,34(2):131-135.
[2]NAKAYAMA F S,BUCKS D A.Water quality in drip/trickle irrigation:A review[J].Irrigation Science,1991,12(4):187-192.
[3]HUANG S,DONG W,WEI Q,et al.Advanced Methods to Develop Drip Emitters with New Channel Types[J].Applied Engineering in Agriculture,2006,22(2):243-249.
[4]杨培岭,雷显龙.滴灌用灌水器的发展及研究[J].节水灌溉,2000(3):17-18.
[5]崔振华.弧形迷宫流道结构参数对水力性能影响[D].杨凌:西北农林科技大学,2009.
[6]SALVADOR P G,ARVIZA V J,BRALTS V F.Hydraulic Flow Behaviour through an in-line Emitter Labyrinth Using CFD Techniques[J].ASAE Paper,2004.
[7]颜廷熠.基于CFD模拟的迷宫滴头工作性能研究[D].北京:中国农业科学院研究生院,2008.
[8]NISHIMURA T,BIAN Y,MATSUMOTO Y,et al.Fluid flow and mass transfer characteristics in a sinusoidal wavy-walled tube at moderate Reynolds numbers for steady flow[J].Heat&Mass Transfer,2003,39(3):239-248.
[9]TATSUO N,SHINICHIRO M,SHINGHO A,et al.Flow observations and mass transfer characteristics in symmetrical wavy-walled channels at moderate Reynolds numbers for steady flow[J].International Journal of Heat&Mass Transfer,1990,33(5):835-845.
[10]ZHANG J,ZHAO W,TANG Y,et al.Numerical investigation of the clogging mechanism in labyrinth channel of the emitter[J].International Journal for Numerical Methods in Engineering,2010,70(13):1 598-1 612.
[11]谢巧丽,牛文全,李连忠.进口结构对迷宫流道滴头性能影响的模拟研究[J].西北农林科技大学学报(自然科学版),2015,43(1):206-212.
[12]OLIVER M M H,HEWA G A,PEZZANITI D.Bio-fouling of subsurface type drip emitters applying reclaimed water under medium soil thermal variation[J].Agricultural Water Management,2014,133(2):12-23.
[13]YAN Dazhuang,YANG Peiling,REN Shumei,et al.Numerical study on flow property in dentate path of drip emitters[J].New Zealand Journal of Agricultural Research,2007,50(5):705-712.
[14]聂磊.基于灌水器流量的湍流模型适应性研究[J].节水灌溉,2008(1):13-17.
[15]潘雅阁.齿形流道结构对滴头水力性能影响的试验研究[D].杨凌:西北农林科技大学,2017.
[16]张重,任树梅,杨培岭,等.圆柱型灌水器迷宫式流道内部流体流动的CFD模拟精度研究[J].中国农业大学学报,2016,21(9):149-155.
[17]WU D,LI Y K,LIU H S,et al.Simulation of the flow characteristics of a drip irrigation emitter with large eddy methods[J].Mathematical&Computer Modelling,2013,58(3/4):497-506.
[18]徐毅,赵钢,王茂枚,等.基于数值模拟的现浇混凝土暗管断面形式研究[J].灌溉排水学报,2018,37(10):94-99.
[19]王延召,张耀哲.渠系节点悬移质淤积分布数值模拟[J].灌溉排水学报,2018,37(5):81-85.
[20]任荣,马娟娟,郑利剑,等.蓄水坑灌水土温度变化对土壤水分再分布规律的影响[J].灌溉排水学报,2018,37(4):39-46.
[21]聂卫波,董书鑫,马孝义.基于灌区尺度的畦田规格优化研究:以泾惠渠灌区为例[J].灌溉排水学报,2018,37(4):113-120.
[22]郭龙.外啮合齿轮泵内部流场瞬态数值模拟研究[D].兰州:兰州理工大学,2017.
[23]刘玉春,吴现兵,刘宏权,等.内镶式滴灌带水力性能试验研究[J].河北农业大学学报,2011,34(2):131-135.