| Experimental analysis of head losses in PE laterals under low pressure trickle irrigation |
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| DOI：10.7606/j.issn.1000-7601.2007.03.48 |
| Key Words: low pressure trickle irrigation laterals calculation of head losses |
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| Abstract: |
| Experiment carried with laterals which internal diameter is 20 mm and tube wall is 1.36 mm under low pressure condition.It can bear pressure which equals to 0.2 MPa and there are orifices which pore size is 0.6 mm spacing at 60 cm. Result indicated that under test condition,and do not taking into account of influence of orifices water disturbance,flow regimes are both laminar and turbulence.But main flow regime is laminar.Head losses calculated by traditional empirical hydraulics formula produces great error,and do not accord with the fact,the range of deviation is 0～14.29%. |
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