基于能坡线法的微灌双向异径毛管设计
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

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)


Hydraulic Design of Micro-irrigation Paired Tapered Laterals Based on Energy Gradient Line Method
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    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。

    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.

    参考文献
    相似文献
    引证文献
引用本文

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.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2015-07-15
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2015-12-10
  • 出版日期: