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| DOI：10.13522/j.cnki.ggps.2019050 |
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| Experimental and Comparative Analysis on Hydraulic Performance of Inclined-jet and Tangential Water Turbines for Hose Reel Irrigators |
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HOU Xinyue, TANG Lingdi, LI Hao, LANG Jingbo, QIU Zhipeng
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1. Heilongjiang Province Hydraulic Research Institute, Harbin 100050, China;2. National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China;3. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China;4. Jiangsu Huayuan Water-saving Co., LTD, Xuzhou 221150, China
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| Abstract: |
| 【Objective】The aim is to grasp the hydraulic characteristics of the existing water turbines for hose reel irrigators in China including inclined-jet type and tangential type, the water turbine hydraulic characteristic test device is built. 【Method】The hydraulic characteristic data of flow rate, inlet pressure, outlet pressure, torque and rotational speed of the two water turbines at a certain speed were tested, and flow-head, flow-power and flow-efficiency characteristic curves for two water turbines were obtained. In addition, the rotational speed characteristics of the two water turbines under a certain head, namely the rotational speed-efficiency and the rotational speed-power curves can be calculated. 【Result】The optimal operating rotational speed of the inclined-jet water turbine was about 300 r/min, the highest efficiency was only 13.8%, while the optimal operating speed of the tangential water turbine was about 600 r/min, and the efficiency was 33.7%. Further comparative analysis showed that compared with the performance of the inclined-jet water turbine, the shaft power of the tangential water turbine increased by 34.3%, the operating flow rate decreased by about 29.7%, and the efficiency increased by 19.9%, when two water turbines operating at the most efficient work point. 【Conclusion】Therefore, the overall performance of the tangential water turbine is better than that of the inclined-jet water turbine, which provides reference data for further improving the performance of the water turbine of the hose reel irrigator. |
| Key words: hose reel irrigator; inclined-jet water turbine; tangential water turbine; hydraulic performance |
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