Abstract:For study on energy consumption of various hydraulic components of the hydraulic turbine of JP75 hose reel irrigator, the external characteristic of the turbine is tested and the flow field is numerically simulated based on a commercial software STAR-CCM+. According to an analysis of pressure and velocity distributions in the turbine, the energy consumption in the connection between the impeller and the inlet pipe is 44.80%, while the whole consumption of the connection is 52.18%. It is also shown that a serious energy consumption are associated with a high pressure gradient and appearance of vortex. Based on this, the original hydraulic turbine design is optimized. As a result, the turbine total efficiency is significantly improved, the total head is reduced obviously and the nominal output power is guaranteed, eventually the goal of optimization has been achieved.
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