鞠学良,吴普特,Weckler R Paul,张林,朱德兰.基于能坡线法的微灌双向异径毛管设计[J].农业机械学报,2015,46(12):47-54.
Ju Xueliang,Wu Pute,Weckler R Paul,Zhang Lin,Zhu Delan.Hydraulic Design of Micro-irrigation Paired Tapered Laterals Based on Energy Gradient Line Method[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(12):47-54.
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基于能坡线法的微灌双向异径毛管设计   [下载全文]
Hydraulic Design of Micro-irrigation Paired Tapered Laterals Based on Energy Gradient Line Method   [Download Pdf][in English]
投稿时间:2015-07-15  
DOI:10.6041/j.issn.1000-1298.2015.12.007
中文关键词:  微灌  双向异径毛管  压力分布  解析模型
基金项目:中国科学院西部之光人才培养计划资助项目、“十二五”国家科技支撑计划资助项目(2011BAD29B02)和教育部、国家外国专家局“111计划”资助项目(B12007)
作者单位
鞠学良 西北农林科技大学 
吴普特 西北农林科技大学 
Weckler R Paul 俄克拉荷马州立大学 
张林 西北农林科技大学 
朱德兰 西北农林科技大学 
中文摘要:根据最佳支管位置是位于使两侧毛管灌水器平均工作压力相等处的定义,基于能坡线法推导了微灌双向异径毛管的最佳支管位置、进口工作压力、水力流量偏差系数及极限管长的计算公式,并给出了最佳支管位置参数的数值表。以此为基础,提出了3种常见设计情况下的微灌双向异径毛管设计步骤。通过3个设计实例表明:该方法准确可靠,可以简便快速地设计各种均匀坡条件下的微灌系统双向异径毛管,提高微灌工程设计效率。
Ju Xueliang  Wu Pute  Weckler R Paul  Zhang Lin  Zhu Delan
Northwest A&F University,Northwest A&F University,Oklahoma State University,Northwest A&F University and Northwest A&F University
Key Words:Micro-irrigation  Paired tapered laterals  Pressure distribution  Analytical model
Abstract:A simple and easily adaptable analytical approach was developed for the hydraulic design of micro-irrigation paired tapered laterals laid on uniformly sloping grounds based on the definition position locations where the same average emitter pressure head existed in the uphill and downhill laterals. Analytical expressions of the best manifold position, inlet working pressure head, coefficient of variation by hydraulic variation and the 〖JP2〗limited length of the paired tapered laterals were separately developed by using the energy gradient line method. Three tables showed the values used in estimating the design parameters of the best manifold position, inlet working pressure head and coefficient of variation by hydraulic variation, respectively, for the common diameter ratio, 〖JP〗pressure loss ratio and velocity exponent. When the length, diameter and designed emitter flow were given, the best manifold position and other parameters of the paired tapered laterals could be directly designed without using iterative methods. When the diameters, designed emitter flow and water application uniformity criterion were provided, the limited length, the best manifold position and remaining parameters of the paired tapered laterals could be easily determined by Excel Equation-Solver in Microsoft Excel. When the length, designed emitter flow and water application uniformity criterion were provided, the design diameter, the best manifold position and the remaining parameters of the paired tapered laterals could also be easily determined in Microsoft Excel by the iterative technique. Three numerical design examples covering various conditions indicated that the proposed approach could produce accurate results for practical purposes.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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