Abstract:In order to study on the hydraulic performance of the structure of two-way flow channel stabilizer in bubbler irrigation emitter, the inner structure of the stabilizer is modelled with three geometrical parameters, namely the angle α between the two splayed baffles, the angle β of V-shaped baffle, and the throat width d of the two splayed baffles. The experimental models have been designed by changing those parameters. The experimental models are manufactured by laser engraving technology, and the flow rates are measured under nine pressures ranged in 0.05-0.21 MPa. The experimental results are fitted by multivariable regression method, showing the models are subject to an excellent hydraulic performance with a flow regime index in 0.476 to 0.501. Meanwhile, the minor hydraulic loss coefficients across the models are calculated. The coefficients are between 18.3 to 19.8, nearly 4-10 times the minor loss coefficients across a traditional flow channel when the operating head is ranged in 5 to 15m, suggesting the designed stabilizers show an excellent energy dissipation behavior. Mathematical relationships between flow regime index and geometrical parameters are developed by using multivariable regression method with Gauss-Newton algorithm based on Minitab software in which the number of iterations is set to be 200. The results show that the regression is significant in statistics in both Significance test and correlation coefficient test. The relationships provide a theoretical basis for parameterized design, structure optimization, development and application in agricultural engineering.
郭霖, 白丹, 王新端, 何靖. 涌泉灌双向流流道稳流器工作机理与水力性能分析[J]. 排灌机械工程学报, 2016, 34(3): 270-276.
GUO Lin, BAI Dan, WANG Xinduan, HE Jing. Analysis of working mechanism and hydraulic performance of two-way flow channel stabilizer in bubbler irrigation emitter. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(3): 270-276.
[1]水利部农村水利司. 喷灌与微灌设备[M]. 北京:中国水利水电出版社,1998.[2]吴普特,朱德兰,汪有科. 涌泉根灌技术研究与应用[J]. 排灌机械工程学报,2010,28(4):354-357. WU Pute, ZHU Delan, WANG Youke. Research and application of bubbled-root irrigation[J]. Journal of drainage and irrigation machinery engineering, 2010, 28(4): 354-357.(in Chinese)[3]王新坤. 微灌毛管进口流量调节器应用的经济性分析[J]. 排灌机械,2008,26(2):57-60. WANG Xinkun. Economic analysis on application of discharge regulator in micro-irrigation lateral inlet[J]. Drainage and irrigation machinery, 2008, 26(2): 57-60.(in Chinese)[4]魏正英,苑伟静,周兴,等. 我国压力补偿灌水器的研究进展[J]. 农业机械学报,2014,45(1):94-107. WEI Zhengying, YUAN Weijing, ZHOU Xing, et al. Research progress of pressure compensating emitters in micro-irrigation systems in china[J]. Transactions of the CSAM, 2014, 45(1): 94-107.(in Chinese)[5]吕谋超,彭贵芳,杨跃辉,等. 微灌流量调节器的研制与应用[J]. 灌溉排水,2001,20(3):29-32. LYU Mouchao, PENG Guifang, YANG Yuehui, et al. Development and application of a flow rate regulator for low flow irrigation[J]. Irrigation and drainage, 2001, 20(3): 29-32.(in Chinese)[6]向清江,施哲夫,李红,等. 远射程消防水炮流道内3种稳流器的对比[J]. 排灌机械工程学报, 2015, 33(3):233-238. XIANG Qingjiang, SHI Zhefu, LI Hong, et al. Comparative analysis of three types of straightener in long range firefighting water cannon[J]. Journal of drainage and irrigation machinery engineering, 2015, 33(3): 233-238.(in Chinese)[7]宗洁,吕谋超. 毛管级流量调节器结构与水力性能的初步研究[J]. 灌溉排水学报,2009,28(2):34-36. ZONG Jie, LYU Mouchao. A preliminary study on the structure and hydraulic performance of lateral grade flow regulator[J]. Journal of irrigation and drainage, 2009, 28(2): 34-36.(in Chinese)[8]党思思,朱德兰,牛文鹏,等. 弹性膜片硬度和厚度对调压装置水力性能的影响[J]. 灌溉排水学报,2013,32(2):15-18. DANG Sisi, ZHU Delan, NIU Wenpeng, et al. Impact of elastic diaphragm parameters on hydraulic performance of pressure regulators [J]. Journal of irrigation and drainage, 2013, 32(2): 15-18.(in Chinese)[9]王新坤,李俊红,李亚飞,等. 基于正交试验的三角环流流道灌水器数值模拟[J].排灌机械工程学报,2010,28(5):444-448. WANG Xinkun, LI Junhong, LI Yafei, et al. Numerical calculation of triangle circulation drip irrigation emitters based on orthogonal experiment [J]. Journal of drainage and irrigation machinery engineering, 2010, 28(5): 444-448.(in Chinese)[10]MUHAMMAD J A, TOMAS S, MOUHEB N A, et al. μ-PIV characterization of the flow in a milli-labyrinth channel used in micro-irrigation[C]//Proceedings of the 17th international symposium on applications of laser techniques to fluid mechanics, Lisbon, Portugal: [s.n.], 2014: 1-15.[11]VEKARIYA P B, SUBBAIAH R, MASHRU H H. Hydraulics of microtube emitters: a dimensional analysis approach [J]. Irrigation science, 2011, 29(4): 341-350.[12]AYDIN M C, EMIROGLU M E. Determination of capacity of labyrinth side weir by CFD[J]. Flow measurement and instrumentation, 2013, 29(1): 1-8.[13]ALI A A M. Anti-clogging drip irrigation emitter design innovation[J]. European international journal of science and technology, 2013, 2(8): 154-160.[14]LI Yunkai, LIU Haisheng, YANG Peiling, et al. Analysis of tracing ability of different sized particles in drip irrigation emitters with computational fluid dynamics[J]. Irrigation and drainage, 2013, 62(3): 340-351.[15]CELIK H K, KARAYEL D, CAGLAYAN N, et al. Rapid prototyping and flow simulation applications in design of agricultural irrigation equipment: case study for a sample in-line drip emitter[J]. Virtual and physical prototyping, 2011, 6(1): 47-56.[16]李云开,冯吉. 滴灌灌水器内部水动力学特性测试研究进展[J].排灌机械工程学报,2014,32(1):86-92. LI Yunkai, FENG Ji. Progress in measurement of hydrodynamic characteristics in drip irrigation emitters[J]. Journal of drainage and irrigation machinery engineering, 2014, 32(1): 86-92.(in Chinese)[17]田济扬,白丹,任长江,等. 滴灌双向流流道灌水器水力特性分析[J]. 农业工程学报,2013,29(20):89-94. TIAN Jiyang, BAI Dan, REN Changjiang, et al. Analysis on hydraulic performance of bidirectional flow channel of drip irrigation emitter[J]. Transactions of the CSAE, 2013, 29(20): 89-94.(in Chinese)[18]李云雁,胡传荣. 试验设计与数据处理[M]. 2版. 北京:化学工业出版社,2008.[19]刘文卿. 实验设计[M]. 北京:清华大学出版社,2005.[20]杜少卿,曾文杰,施泽,等. 工作压力对滴灌管迷宫流道灌水器水力性能的影响[J]. 农业工程学报,2011,27(S2):55-60. DU Shaoqing, ZENG Wenjie, SHI Ze, et al. Effects of working pressure on hydraulic performances of labyrinth path emitters[J]. Transactions of the CSAE, 2011, 27(S2): 55-60.(in Chinese)[21]赵振兴,何建京. 水力学[M]. 2版. 北京:清华大学出版社,2010.[22]魏青松,史玉升,芦刚,等. 精密滴灌灌水器快速响应开发的方法[J]. 农业机械学报,2007,38(2):93-97. WEI Qingsong, SHI Yusheng, LU Gang, et al. Study on the rapid respond method to develop precise drip emitters[J]. Transactions of the CSAM, 2007, 38(2): 93-97.(in Chinese)[23]ZHANG Jun, ZHAO Wanhua, TANG Yiping, et al. Anti-clogging performance evaluation and parameterized design of emitters with labyrinth channels[J]. Computers and electronics in agriculture, 2010, 74(1): 59-65.