摘要
微灌是一种精准高效的节水灌溉,包括地表滴管、地下滴管、微喷灌等形式。均匀度是评价微灌的重要指标,均匀系数的微小变化将会引起工程造价的很大波动,因此有必要建立均匀性计算模型,以便更好地指导管道设计。基于国内外研究现状,以微灌支管单元为研究对象,从流体力学原理出发,建立考虑三偏差的均匀系数计算模型,并重点计算了毛管局部水头损失占沿程阻力损失的比例,希望为今后微灌支管单元设计提供帮助。
Micro- irrigation is an accurate and efficient water saving irrigation,its surface dropper,underground dropper,micro irrigation,evenness is an important index of evaluation of micro- irrigation level. Uniformity coefficient of the small changes will lead to large fluctuations in the project cost,so it is necessary to establish uniformity calculation model,in order to better guide the pipeline design. Based on the research status both at home and abroad,and micro- irrigation pipe unit as the research object,based on fluid mechanics principle,consider three deviation of uniformity coefficient calculation model is established. Capillary and emphasized on the research of local head loss of frictional resistance loss ratio,hope for the future of micro- irrigation pipe unit design to offer help.
出处
《水利科技与经济》
2015年第6期36-38,共3页
Water Conservancy Science and Technology and Economy
关键词
微灌
支管单元
均匀系数
局部损失
micro-irrigation
branch pipe unit
uniformity coefficient
partial loss
