Hydraulic performance of new pressure-compensating emitter with large flow
Li Lingyuan1, Zhu Delan1,2, Zhang Lin2
1.College of Water Resource and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Abstract:In order to develop a new kind of large flow pressure compensation emitter for economic fo-rest, taking the advantage of Pro/E, the three-dimensional model of the emitter was completed, and the rapid laser-molding was used to manufacture the emitter. To analyze the effect of important structural parameters on hydraulic performance such as exponent and flow of pressure compensation emitter with large flow, diaphragm thickness, diaphragm hardness and foundation height were studied based on the orthogonal test. The results show that: foundation bed height and pressure compensating range have related correlation; diaphragm thickness has the largest influence on flow exponent, followed by foundation bed height and diaphragm hardness. Diaphragm thickness has the largest impact on flow q, fo-llowed by diaphragm hardness and foundation height. Large flow pressure compensating emitter with the best hydraulic performance is optimized with the structural parameters as follows: a thickness of 1.3 mm, a hardness of 50° and a height of 4 mm. This kind of emitter has pressure compensating ranges from 50 kPa to 400 kPa, while flow exponent is 0.055 1, and flow q is 13.10 L/h.
李令媛, 朱德兰,, 张林. 大流量压力补偿式灌水器水力性能[J]. 排灌机械工程学报, 2013, 31(12): 1083-1088.
Li Lingyuan, Zhu Delan,, Zhang Lin. Hydraulic performance of new pressure-compensating emitter with large flow. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(12): 1083-1088.
[1]魏正英,唐一平,程应社,等.一体式压力补偿式灌水器快速设计新方法[J].中国机械工程,2008(12):1387-1392. Wei Zhengying,Tang Yiping,Cheng Yingshe,et al. A new method for rapid design of the integral pressure compensating emitters [J].China Mechanical Enginee-ring,2008(12):1387-1392.(in Chinese)[2]Rodríguez-Sinobas L,Gil M,Sánchez R,et al. Evaluation of drip and subsurface drip irrigation in a uniform loamy soil [J]. Soil Science,2012,177(2):147-152.[3]Wei Qingsong,Shi Yusheng,Dong Wenchu,et al. Study on hydraulic performance of drip emitters by computational fluid dynamics [J]. Agricultural Water Management,2006,84(1/2):130-136. [4]邓涛,魏正英,王立朋,等.压力补偿灌水器分步式CFD设计与实验研究[J].清华大学学报:自然科学版,2012,52(4):513-516,522. Deng Tao,Wei Zhengying,Wang Lipeng,et al. Stepwise CFD simulation and experiments of pressure-compensating emitters [J]. Journal of Tsinghua University: Science and Technology,2012,52(4):513-516,522.(in Chinese)[5]Barragan J,Bralts V,Wu I P. Assessment of emission uniformity for micro irrigation design [J]. Biosystems Engineering,2006,93(1):89-97.[6]Rami E G,Bezian J,Grenouilleau P,et al.Stability study and modelling of a pressure regulating station [J]. International Journal of Pressure Vessels and Piping,2005,82:51-60. [7]Gil M,Rodríguez-Sinobas L,Sánchez R. Procedures for determining maximum emitter discharge in subsurface drip irrigation[J]. Journal of Irrigation and Drainage Engineering,2011,137(5):287-294.[8]刘海军,黄冠华,王鹏超,等.再生水滴灌对滴头堵塞的影响[J].农业工程学报,2009,25(9):15-20. Liu Haijun,Huang Guanhua,Wang Pengchao,et al. Effect of drip irrigation with reclaimed water on emitter clogging [J]. Transactions of the CSAE,2009,25(9):15-20.(in Chinese)[9]吴显斌,吴文勇,刘洪禄,等.再生水滴灌系统滴头抗堵塞性能试验研究[J].农业工程学报,2008,24(5):61-64. Wu Xianbin,Wu Wenyong,Liu Honglu,et al. Experimental study on anti-clogging performance of emitters for reclaimed wastewater irrigation[J].Transactions of the CSAE,2008,24(5):61-64.(in Chinese)[10]Puig-Bargués,Arbat G,Elbana M,et al. Effect of flushing frequency on emitter clogging in micro-irrigation with effluents[J].Agricultural Water Management,2012,97:883-891.[11]何静,李光永,刘志峰.典型压力补偿滴头结构分析[J].节水灌溉,2006(5):29-34. He Jing,Li Guangyong,Liu Zhifeng.Analysis on the structure of typical pressure compensating emitters[J].Water Saving Irrigation,2006(5):29-34.(in Chinese)[12]王立朋,魏正英,邓涛,等.压力补偿灌水器分步式计算流体动力学设计方法[J].农业工程学报,2012,28(11):86-92. Wang Lipeng,Wei Zhengying,Deng Tao,et al. Step-by-step CFD design method of pressure compensating emitter [J].Transactions of the CSAE,2012,28(11):86-92.(in Chinese)[13]施卫东,周岭,陆伟刚,等. 高扬程深井离心泵的正交试验与优化设计[J]. 江苏大学学报:自然科学版,2011,32(4):400-404. Shi Weidong,Zhou Ling,Lu Weigang,et al.Orthogonal test and optimization design of high-head deep-well centrifugal pump [J].Journal of Jiangsu University:Natural Science Edition,2011,32(4):400-404.(in Chinese)[14]Deng Dehuai,Liu Yuan,Jiang Lianbo,et al. Design optimization of cutting parameters for phase-change heat sink P-E forming based on orthogonal experiment [J].Energy Procedia,2012,17:1979-1984.[15]Wang B H,Jin Y,Luo Y G.Parametric optimization of EQ6110HEV hybrid electric bus based on orthogonal experiment design [J].International Journal of Automotive Technology,2010,11(1):119-125.[16]Zhai Yingni,Sun Shudong,Wang Junqiang,et al.Job shop bottleneck detection based on orthogonal experiment[J].Computers and Industrial Engineering,2011,61(3):872-880.[17]国家标准局.GB/T 17187—2009/ISO 926农业灌溉设备滴头和滴灌管技术规范和试验方法[S].北京:标准出版社,2004.[18]国家标准局.GB/T 1981.22—2005塑料节水灌溉器材压力补偿式滴头及滴灌管[S].北京:标准出版社,1981.