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| Running speed and pressure head loss of the light and small sprinkler irrigation system |
| CAO Hua1,2, GUO Fengtai1, FAN Yongshen2, DUAN Fuyi2, HAN Qibiao2, JIA Yanhui2, CHEN Zhen2 |
| 1.College of Water Conservancy and Hydropower, Hebei University of Engineering, Handan, Hebei 056038, China; 2.Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang, Henan 453002, China |
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Abstract In order to study the reasonable value of the light and small sprinkler irrigation system′s running speed under the low-pressure sprinkler irrigation, and the relation between the working pressure and the pressure head loss of sprinkler irrigation system, the light and small sprinkler irrigation system was taken as the research object, and through the indoor sprinkler irrigation test, the relation between the system′s running speed and irrigation quota under a certain working pressure and flow rate was studied, in addition the local head loss and the frictional head loss of the system were analyzed. The results show that irrigation quota has a certain relationship with the running speed and working pressure of the light and small sprinkler irrigation system, thus the corresponding running speed may be modulated by determining the irrigation quota. The outlet pressure at the sprayer of the spraying car can increase with the increase of the single sprinkler pressure of the reel truck in the light and small sprinkler irrigation system. However, the increase rate of the outlet pressure will decrease when the single sprinkler pressure increases to a certain extent. Therefore, within the normal operating range of the system, its inlet pressure can be decreased to an appropriate range so as to reduce the pressure head loss of the system, save energy and reduce the operating cost of the system. As the light and small sprinkler irrigation system has a wide development prospect in China, this research will be of great significance in improving the performance of the light and small sprinkler irrigation system in China and provide a reference for the development of the light and small sprinkler irrigation system in China.
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Received: 17 August 2015
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