Yang, C.; Zhang, Q.; Guo, J.; Wu, J.; Zheng, Y.; Ren, Z. Optimal Design and Fish-Passing Performance Analysis of a Fish-Friendly Axial Flow Pump. Appl. Sci.2023, 13, 12056.
Yang, C.; Zhang, Q.; Guo, J.; Wu, J.; Zheng, Y.; Ren, Z. Optimal Design and Fish-Passing Performance Analysis of a Fish-Friendly Axial Flow Pump. Appl. Sci. 2023, 13, 12056.
Yang, C.; Zhang, Q.; Guo, J.; Wu, J.; Zheng, Y.; Ren, Z. Optimal Design and Fish-Passing Performance Analysis of a Fish-Friendly Axial Flow Pump. Appl. Sci.2023, 13, 12056.
Yang, C.; Zhang, Q.; Guo, J.; Wu, J.; Zheng, Y.; Ren, Z. Optimal Design and Fish-Passing Performance Analysis of a Fish-Friendly Axial Flow Pump. Appl. Sci. 2023, 13, 12056.
Abstract
In the process of construction and operation of the pumping station, a large number of axial flow pumps pose a threat to the survival of fish in the natural environment. Through experiments, the survival conditions of many kinds of fish in extreme positive and negative pressure environment are explored, and -40 kPa is established as the low pressure damage threshold, which is used as a reference to analyze the probability of fish damage caused by pumps. The immersion boundary-lattice Boltzmann numerical method (LES-IB-LBM) based on large eddy simulation is used to optimize the parameters of the prototype runner of axial flow pump. A new type of runner with leading edge thickness of 11.4mm and blade cutting angle of 18 ° is optimized. This kind of runner has both hydraulic performance and fish-passing ability. The runner of the fish-friendly axial flow pump effectively guides the fish into the low risk area and reduces the risk of friction, shear and impact damage to the fish. the total impact mortality ratio of the runner of the axial flow pump before and after optimization is close to 7:1. The pressure damage analysis shows that the lowest negative pressure of the fish is -59.2 kPa, which is higher than -64.5 kPa of the prototype pump, and the highest positive pressure of the body surface is 11.8 kPa, which is lower than the 43.8 kPa of the prototype pump. Shear damage analysis shows that the fish will not be damaged by shear in the prototype pump and fish-friendly pump.
Copyright:
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